diff --git a/common/pom.xml b/common/pom.xml
index 4d79ce92a..d190028ee 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -20,12 +20,12 @@
             <scope>compile</scope> <!-- Velocity doesn't have snakeyaml -->
         </dependency>
 
-        <!-- FastUtil for optional performance increases -->
+        <!-- FastUtil for performance increases -->
         <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>fastutil</artifactId>
             <version>8.3.1</version>
-            <scope>provided</scope>
+            <scope>compile</scope>
         </dependency>
     </dependencies>
 </project>
diff --git a/common/src/main/java/us/myles/ViaVersion/api/protocol/ProtocolRegistry.java b/common/src/main/java/us/myles/ViaVersion/api/protocol/ProtocolRegistry.java
index 4d7929359..1880d3ad6 100644
--- a/common/src/main/java/us/myles/ViaVersion/api/protocol/ProtocolRegistry.java
+++ b/common/src/main/java/us/myles/ViaVersion/api/protocol/ProtocolRegistry.java
@@ -2,6 +2,8 @@ package us.myles.ViaVersion.api.protocol;
 
 import com.google.common.collect.Lists;
 import com.google.common.collect.Range;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
 import org.jetbrains.annotations.Nullable;
 import us.myles.ViaVersion.api.Pair;
 import us.myles.ViaVersion.api.Via;
@@ -31,8 +33,6 @@ import us.myles.ViaVersion.protocols.protocol1_9_1to1_9.Protocol1_9_1To1_9;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.Protocol1_9_3To1_9_1_2;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
 import us.myles.ViaVersion.protocols.protocol1_9to1_9_1.Protocol1_9To1_9_1;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntObjectMap;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -54,7 +54,7 @@ public class ProtocolRegistry {
     public static final Protocol BASE_PROTOCOL = new BaseProtocol();
     public static int SERVER_PROTOCOL = -1;
     // Input Version -> Output Version & Protocol (Allows fast lookup)
-    private static final IntObjectMap<IntObjectMap<Protocol>> registryMap = CollectionUtil.createIntObjectMap(32);
+    private static final Int2ObjectMap<Int2ObjectMap<Protocol>> registryMap = new Int2ObjectOpenHashMap<>(32);
     private static final Map<Class<? extends Protocol>, Protocol> protocols = new HashMap<>();
     private static final Map<Pair<Integer, Integer>, List<Pair<Integer, Protocol>>> pathCache = new ConcurrentHashMap<>();
     private static final Set<Integer> supportedVersions = new HashSet<>();
@@ -128,7 +128,7 @@ public class ProtocolRegistry {
      * @param supported Supported client versions.
      * @param output    The output server version it converts to.
      */
-    public static void registerProtocol(Protocol protocol, List<Integer> supported, Integer output) {
+    public static void registerProtocol(Protocol protocol, List<Integer> supported, int output) {
         // Clear cache as this may make new routes.
         if (!pathCache.isEmpty()) {
             pathCache.clear();
@@ -137,9 +137,9 @@ public class ProtocolRegistry {
         protocols.put(protocol.getClass(), protocol);
 
         for (int version : supported) {
-            IntObjectMap<Protocol> protocolMap = registryMap.get(version);
+            Int2ObjectMap<Protocol> protocolMap = registryMap.get(version);
             if (protocolMap == null) {
-                protocolMap = CollectionUtil.createIntObjectMap(1);
+                protocolMap = new Int2ObjectOpenHashMap<>(1);
                 registryMap.put(version, protocolMap);
             }
 
@@ -211,8 +211,8 @@ public class ProtocolRegistry {
      * @return True if there is a useful pipe
      */
     public static boolean isWorkingPipe() {
-        for (IntObjectMap<Protocol> maps : registryMap.getMap().values()) {
-            if (maps.containsKey(SERVER_PROTOCOL)) return true;
+        for (Int2ObjectMap<Protocol> map : registryMap.values()) {
+            if (map.containsKey(SERVER_PROTOCOL)) return true;
         }
         return false; // No destination for protocol
     }
@@ -241,7 +241,7 @@ public class ProtocolRegistry {
         if (current.size() > 50) return null; // Fail safe, protocol too complicated.
 
         // First check if there is any protocols for this
-        IntObjectMap<Protocol> inputMap = registryMap.get(clientVersion);
+        Int2ObjectMap<Protocol> inputMap = registryMap.get(clientVersion);
         if (inputMap == null) {
             return null; // Not supported
         }
@@ -255,24 +255,23 @@ public class ProtocolRegistry {
 
         // There might be a more advanced solution... So we'll see if any of the others can get us there
         List<Pair<Integer, Protocol>> shortest = null;
-
-        for (Map.Entry<Integer, Protocol> entry : inputMap.getMap().entrySet()) {
+        for (Int2ObjectMap.Entry<Protocol> entry : inputMap.int2ObjectEntrySet()) {
             // Ensure it wasn't caught by the other loop
-            if (!entry.getKey().equals(serverVersion)) {
-                Pair<Integer, Protocol> pair = new Pair<>(entry.getKey(), entry.getValue());
-                // Ensure no recursion
-                if (!current.contains(pair)) {
-                    // Create a copy
-                    List<Pair<Integer, Protocol>> newCurrent = new ArrayList<>(current);
-                    newCurrent.add(pair);
-                    // Calculate the rest of the protocol using the current
-                    newCurrent = getProtocolPath(newCurrent, entry.getKey(), serverVersion);
-                    if (newCurrent != null) {
-                        // If it's shorter then choose it
-                        if (shortest == null || shortest.size() > newCurrent.size()) {
-                            shortest = newCurrent;
-                        }
-                    }
+            if (entry.getIntKey() == (serverVersion)) continue;
+
+            Pair<Integer, Protocol> pair = new Pair<>(entry.getIntKey(), entry.getValue());
+            // Ensure no recursion
+            if (current.contains(pair)) continue;
+
+            // Create a copy
+            List<Pair<Integer, Protocol>> newCurrent = new ArrayList<>(current);
+            newCurrent.add(pair);
+            // Calculate the rest of the protocol using the current
+            newCurrent = getProtocolPath(newCurrent, entry.getKey(), serverVersion);
+            if (newCurrent != null) {
+                // If it's shorter then choose it
+                if (shortest == null || shortest.size() > newCurrent.size()) {
+                    shortest = newCurrent;
                 }
             }
         }
diff --git a/common/src/main/java/us/myles/ViaVersion/api/rewriters/MetadataRewriter.java b/common/src/main/java/us/myles/ViaVersion/api/rewriters/MetadataRewriter.java
index 1590a4eb8..d32532f54 100644
--- a/common/src/main/java/us/myles/ViaVersion/api/rewriters/MetadataRewriter.java
+++ b/common/src/main/java/us/myles/ViaVersion/api/rewriters/MetadataRewriter.java
@@ -1,5 +1,7 @@
 package us.myles.ViaVersion.api.rewriters;
 
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import org.jetbrains.annotations.Nullable;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.UserConnection;
@@ -12,8 +14,6 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.storage.EntityTracker;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -25,7 +25,7 @@ import java.util.logging.Logger;
 public abstract class MetadataRewriter {
     private final Class<? extends EntityTracker> entityTrackerClass;
     private final Protocol protocol;
-    private IntMap typeMapping;
+    private Int2IntMap typeMapping;
 
     protected MetadataRewriter(Protocol protocol, Class<? extends EntityTracker> entityTrackerClass) {
         this.protocol = protocol;
@@ -184,7 +184,7 @@ public abstract class MetadataRewriter {
     }
 
     public <T extends Enum<T> & EntityType> void mapTypes(EntityType[] oldTypes, Class<T> newTypeClass) {
-        if (typeMapping == null) typeMapping = CollectionUtil.createIntMap(oldTypes.length);
+        if (typeMapping == null) typeMapping = new Int2IntOpenHashMap(oldTypes.length);
         for (EntityType oldType : oldTypes) {
             try {
                 T newType = Enum.valueOf(newTypeClass, oldType.name());
@@ -199,7 +199,7 @@ public abstract class MetadataRewriter {
     }
 
     public void mapType(EntityType oldType, EntityType newType) {
-        if (typeMapping == null) typeMapping = CollectionUtil.createIntMap();
+        if (typeMapping == null) typeMapping = new Int2IntOpenHashMap();
         typeMapping.put(oldType.getId(), newType.getId());
     }
 
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/ConnectionData.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/ConnectionData.java
index 5aa77d1a4..c2f8ac3a4 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/ConnectionData.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/ConnectionData.java
@@ -3,6 +3,10 @@ package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
+import it.unimi.dsi.fastutil.ints.IntSet;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.MappingDataLoader;
@@ -16,9 +20,6 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.Protocol1_13To1_12_2;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections.providers.BlockConnectionProvider;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections.providers.PacketBlockConnectionProvider;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntObjectMap;
-import us.myles.ViaVersion.util.fastutil.IntSet;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -30,11 +31,11 @@ import java.util.Map.Entry;
 public class ConnectionData {
     private static final BlockChangeRecord[] A = new BlockChangeRecord[0];
     public static BlockConnectionProvider blockConnectionProvider;
-    static IntObjectMap<String> idToKey = CollectionUtil.createIntObjectMap(8582);
+    static Int2ObjectMap<String> idToKey = new Int2ObjectOpenHashMap<>(8582);
     static Map<String, Integer> keyToId = new HashMap<>(8582);
-    static IntObjectMap<ConnectionHandler> connectionHandlerMap = CollectionUtil.createIntObjectMap(1);
-    static IntObjectMap<BlockData> blockConnectionData = CollectionUtil.createIntObjectMap(1);
-    static IntSet occludingStates = CollectionUtil.createIntSet(377);
+    static Int2ObjectMap<ConnectionHandler> connectionHandlerMap = new Int2ObjectOpenHashMap<>(1);
+    static Int2ObjectMap<BlockData> blockConnectionData = new Int2ObjectOpenHashMap<>(1);
+    static IntSet occludingStates = new IntOpenHashSet(377);
 
     public static void update(UserConnection user, Position position) {
         for (BlockFace face : BlockFace.values()) {
@@ -212,10 +213,10 @@ public class ConnectionData {
             keyToId.put(key, id);
         }
 
-        connectionHandlerMap = CollectionUtil.createIntObjectMap(3650);
+        connectionHandlerMap = new Int2ObjectOpenHashMap<>(3650);
 
         if (!Via.getConfig().isReduceBlockStorageMemory()) {
-            blockConnectionData = CollectionUtil.createIntObjectMap(1146);
+            blockConnectionData = new Int2ObjectOpenHashMap<>(1146);
             JsonObject mappingBlockConnections = MappingDataLoader.loadData("blockConnections.json");
             for (Entry<String, JsonElement> entry : mappingBlockConnections.entrySet()) {
                 int id = keyToId.get(entry.getKey());
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/FlowerConnectionHandler.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/FlowerConnectionHandler.java
index 14eac24c9..801a7d63d 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/FlowerConnectionHandler.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/FlowerConnectionHandler.java
@@ -1,18 +1,17 @@
 package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections;
 
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.api.minecraft.BlockFace;
 import us.myles.ViaVersion.api.minecraft.Position;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
 
 import java.util.HashSet;
 import java.util.Set;
 
 
 public class FlowerConnectionHandler extends ConnectionHandler {
-    private static final IntMap flowers = CollectionUtil.createIntMap();
+    private static final Int2IntOpenHashMap flowers = new Int2IntOpenHashMap();
 
     static ConnectionData.ConnectorInitAction init() {
         final Set<String> baseFlower = new HashSet<>();
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/RedstoneConnectionHandler.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/RedstoneConnectionHandler.java
index a09528880..918691470 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/RedstoneConnectionHandler.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/RedstoneConnectionHandler.java
@@ -1,18 +1,17 @@
 package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections;
 
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.api.minecraft.BlockFace;
 import us.myles.ViaVersion.api.minecraft.Position;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
 
 import java.util.HashSet;
 import java.util.Set;
 
 public class RedstoneConnectionHandler extends ConnectionHandler {
     private static final Set<Integer> redstone = new HashSet<>();
-    private static final IntMap connectedBlockStates = CollectionUtil.createIntMap(1296);
-    private static final IntMap powerMappings = CollectionUtil.createIntMap(1296);
+    private static final Int2IntOpenHashMap connectedBlockStates = new Int2IntOpenHashMap(1296);
+    private static final Int2IntOpenHashMap powerMappings = new Int2IntOpenHashMap(1296);
 
     static ConnectionData.ConnectorInitAction init() {
         final RedstoneConnectionHandler connectionHandler = new RedstoneConnectionHandler();
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/BlockIdData.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/BlockIdData.java
index 49e2ae9ff..b1e547384 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/BlockIdData.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/BlockIdData.java
@@ -2,9 +2,9 @@ package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data;
 
 import com.google.common.collect.ObjectArrays;
 import com.google.gson.reflect.TypeToken;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
 import us.myles.ViaVersion.util.GsonUtil;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntObjectMap;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -15,7 +15,7 @@ import java.util.Map;
 public class BlockIdData {
     public static Map<String, String[]> blockIdMapping;
     public static Map<String, String[]> fallbackReverseMapping;
-    public static IntObjectMap<String> numberIdToString;
+    public static Int2ObjectMap<String> numberIdToString;
 
     public static void init() {
         InputStream stream = MappingData.class.getClassLoader()
@@ -47,11 +47,11 @@ public class BlockIdData {
                 .getResourceAsStream("assets/viaversion/data/blockNumberToString1.12.json");
         InputStreamReader blockR = new InputStreamReader(blockS);
         try {
-            numberIdToString = CollectionUtil.createIntObjectMap(new HashMap<>(GsonUtil.getGson().fromJson(
+            numberIdToString = new Int2ObjectOpenHashMap<>(GsonUtil.getGson().fromJson(
                     blockR,
                     new TypeToken<Map<Integer, String>>() {
                     }.getType()
-            )));
+            ));
         } finally {
             try {
                 blockR.close();
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/EntityTypeRewriter.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/EntityTypeRewriter.java
index bb58d6bb7..856472b5e 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/EntityTypeRewriter.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/EntityTypeRewriter.java
@@ -1,10 +1,9 @@
 package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data;
 
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 
 public class EntityTypeRewriter {
-    private static final IntMap ENTITY_TYPES = CollectionUtil.createIntMap(93);
+    private static final Int2IntOpenHashMap ENTITY_TYPES = new Int2IntOpenHashMap(93);
 
     static {
         registerEntity(1, 32); // item - ajl
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/WorldPackets.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/WorldPackets.java
index 1ffc37a6b..d57925314 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/WorldPackets.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/WorldPackets.java
@@ -1,6 +1,8 @@
 package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.packets;
 
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
+import it.unimi.dsi.fastutil.ints.IntSet;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.UserConnection;
@@ -26,14 +28,12 @@ import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.storage.BlockStorage;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.types.Chunk1_13Type;
 import us.myles.ViaVersion.protocols.protocol1_9_1_2to1_9_3_4.types.Chunk1_9_3_4Type;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntSet;
 
 import java.util.List;
 import java.util.Optional;
 
 public class WorldPackets {
-    private static final IntSet VALID_BIOMES = CollectionUtil.createIntSet(70);
+    private static final IntSet VALID_BIOMES = new IntOpenHashSet(70);
 
     static {
         // Client will crash if it receives a invalid biome id
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/storage/BlockStorage.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/storage/BlockStorage.java
index 94e9fcaa9..4f032b8c9 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/storage/BlockStorage.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/storage/BlockStorage.java
@@ -1,16 +1,16 @@
 package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.storage;
 
+import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
+import it.unimi.dsi.fastutil.ints.IntSet;
 import us.myles.ViaVersion.api.data.StoredObject;
 import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.api.minecraft.Position;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntSet;
 
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
 public class BlockStorage extends StoredObject {
-    private static final IntSet WHITELIST = CollectionUtil.createIntSet(46);
+    private static final IntSet WHITELIST = new IntOpenHashSet(46);
     private final Map<Position, ReplacementData> blocks = new ConcurrentHashMap<>();
 
     static {
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/data/MappingData.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/data/MappingData.java
index eec379699..202edeb12 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/data/MappingData.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/data/MappingData.java
@@ -5,11 +5,11 @@ import com.google.common.collect.HashBiMap;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
+import it.unimi.dsi.fastutil.ints.IntSet;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.MappingDataLoader;
 import us.myles.ViaVersion.api.data.Mappings;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntSet;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -40,7 +40,7 @@ public class MappingData {
 
         JsonObject heightMapData = MappingDataLoader.loadData("heightMapData-1.14.json");
         JsonArray motionBlocking = heightMapData.getAsJsonArray("MOTION_BLOCKING");
-        MappingData.motionBlocking = CollectionUtil.createIntSet(motionBlocking.size());
+        MappingData.motionBlocking = new IntOpenHashSet(motionBlocking.size());
         for (JsonElement blockState : motionBlocking) {
             String key = blockState.getAsString();
             Integer id = blockStateMap.get(key);
@@ -52,7 +52,7 @@ public class MappingData {
         }
 
         if (Via.getConfig().isNonFullBlockLightFix()) {
-            nonFullBlocks = CollectionUtil.createIntSet(1611);
+            nonFullBlocks = new IntOpenHashSet(1611);
             for (Map.Entry<String, JsonElement> blockstates : mapping1_13_2.getAsJsonObject("blockstates").entrySet()) {
                 final String state = blockstates.getValue().getAsString();
                 if (state.contains("_slab") || state.contains("_stairs") || state.contains("_wall["))
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/ItemRewriter.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/ItemRewriter.java
index 659a3ac02..2aa6d4ef3 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/ItemRewriter.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/ItemRewriter.java
@@ -4,9 +4,9 @@ import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.ListTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import com.github.steveice10.opennbt.tag.builtin.Tag;
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import us.myles.ViaVersion.api.minecraft.item.Item;
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
 
 import java.util.Collections;
 import java.util.HashMap;
@@ -19,7 +19,7 @@ public class ItemRewriter {
     private static final Map<String, Integer> POTION_NAME_TO_ID = new HashMap<>();
     private static final Map<Integer, String> POTION_ID_TO_NAME = new HashMap<>();
 
-    private static final IntMap POTION_INDEX = CollectionUtil.createIntMap(36);
+    private static final Int2IntMap POTION_INDEX = new Int2IntOpenHashMap(36);
 
     static {
         /* Entities */
@@ -220,7 +220,7 @@ public class ItemRewriter {
             return str;
         }
         // hacky but it works :)
-        str = "\u00A7r" + str;
+        str = "§r" + str;
         return str;
     }
 
@@ -392,12 +392,12 @@ public class ItemRewriter {
         return (index = POTION_INDEX.get(oldID)) != -1 ? index : 0;
     }
 
-    private static void registerEntity(Integer id, String name) {
+    private static void registerEntity(int id, String name) {
         ENTTIY_ID_TO_NAME.put(id, name);
         ENTTIY_NAME_TO_ID.put(name, id);
     }
 
-    private static void registerPotion(Integer id, String name) {
+    private static void registerPotion(int id, String name) {
         POTION_INDEX.put(id, POTION_ID_TO_NAME.size());
         POTION_ID_TO_NAME.put(id, name);
         POTION_NAME_TO_ID.put(name, id);
diff --git a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/sounds/Effect.java b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/sounds/Effect.java
index dd0a5a115..4884f6c1c 100644
--- a/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/sounds/Effect.java
+++ b/common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/sounds/Effect.java
@@ -1,11 +1,11 @@
 package us.myles.ViaVersion.protocols.protocol1_9to1_8.sounds;
 
-import us.myles.ViaVersion.util.fastutil.CollectionUtil;
-import us.myles.ViaVersion.util.fastutil.IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 
 public class Effect {
 
-    private static final IntMap EFFECTS = CollectionUtil.createIntMap(17);
+    private static final Int2IntMap EFFECTS = new Int2IntOpenHashMap(17);
 
     static {
         addRewrite(1005, 1010); //Play music disc
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/CollectionUtil.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/CollectionUtil.java
deleted file mode 100644
index b4164a01b..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/CollectionUtil.java
+++ /dev/null
@@ -1,95 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import com.google.common.base.Preconditions;
-
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
-
-/**
- * Utility class to possibly wrap FastUtil collections for faster access.
- * These should only be used for high access and low/no change collections, since resizing FastUtil collections is expensive.
- */
-public class CollectionUtil {
-    private static final boolean FAST_UTIL = checkForFastUtil();
-
-    private static boolean checkForFastUtil() {
-        try {
-            Class.forName("it.unimi.dsi.fastutil.ints.Int2IntMap");
-            return true;
-        } catch (ClassNotFoundException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Creates a new FastUtil collection from the given map if present, else simply wraps the original.
-     *
-     * @param originalMap map to be reflected
-     * @return wrapped int map
-     */
-    public static IntMap createIntMap(Map<Integer, Integer> originalMap) {
-        Preconditions.checkNotNull(originalMap);
-        return FAST_UTIL ? new WrappedFUIntMap(originalMap) : new WrappedIntMap(originalMap);
-    }
-
-    /**
-     * Creates a new FastUtil collection if present, else simply wraps a normal HashMap.
-     *
-     * @param size expected size of the collection
-     * @return wrapped int map
-     */
-    public static IntMap createIntMap(int size) {
-        return FAST_UTIL ? new WrappedFUIntMap(size) : new WrappedIntMap(size);
-    }
-
-    public static IntMap createIntMap() {
-        return FAST_UTIL ? new WrappedFUIntMap(16) : new WrappedIntMap(new HashMap<>());
-    }
-
-    /**
-     * Creates a new FastUtil collection from the given map if present, else simply wraps the original.
-     *
-     * @param originalMap map to be reflected
-     * @return wrapped int map
-     */
-    public static <V> IntObjectMap<V> createIntObjectMap(Map<Integer, V> originalMap) {
-        Preconditions.checkNotNull(originalMap);
-        return FAST_UTIL ? new WrappedFUIntObjectMap<>(originalMap) : new WrappedIntObjectMap<>(originalMap);
-    }
-
-    /**
-     * Creates a new FastUtil collection if present, else simply wraps a normal HashMap.
-     *
-     * @param size expected size of the collection
-     * @return wrapped int map
-     */
-    public static <V> IntObjectMap<V> createIntObjectMap(int size) {
-        return FAST_UTIL ? new WrappedFUIntObjectMap<>(size) : new WrappedIntObjectMap<>(size);
-    }
-
-    /**
-     * Creates a new FastUtil collection from the given set if present, else simply wraps the original.
-     *
-     * @param originalSet set to be reflected
-     * @return wrapped int set
-     */
-    public static IntSet createIntSet(Set<Integer> originalSet) {
-        Preconditions.checkNotNull(originalSet);
-        return FAST_UTIL ? new WrappedFUIntSet(originalSet) : new WrappedIntSet(originalSet);
-    }
-
-    /**
-     * Creates a new FastUtil collection if present, else simply wraps a normal HashSet.
-     *
-     * @param size expected size of the collection
-     * @return wrapped int set
-     */
-    public static IntSet createIntSet(int size) {
-        return FAST_UTIL ? new WrappedFUIntSet(size) : new WrappedIntSet(size);
-    }
-
-    public static boolean hasFastUtil() {
-        return FAST_UTIL;
-    }
-}
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntMap.java
deleted file mode 100644
index 9498e7360..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntMap.java
+++ /dev/null
@@ -1,46 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import java.util.Map;
-
-/**
- * Very simple wrapping interface to either be implemented by a HashMap or FastUtil's OpenHashMap.
- */
-public interface IntMap {
-
-    /**
-     * @return value if present, -1 otherwise
-     * @see java.util.HashMap#get(Object)
-     */
-    default int get(int key) {
-        return getOrDefault(key, -1);
-    }
-
-    /**
-     * @see java.util.HashMap#getOrDefault(Object, Object)
-     */
-    int getOrDefault(int key, int def);
-
-    /**
-     * @see java.util.HashMap#containsKey(Object)
-     */
-    boolean containsKey(int key);
-
-    /**
-     * @see java.util.HashMap#put(Object, Object)
-     */
-    int put(int key, int value);
-
-    /**
-     * @see java.util.HashMap#remove(Object)
-     */
-    int remove(int key);
-
-    /**
-     * Returns the underlying map for usage of not implemented methods of this class.
-     *
-     * @return original map
-     * @deprecated will cause wrapping if it is a FastUtil collection
-     */
-    @Deprecated
-    Map<Integer, Integer> getMap();
-}
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntObjectMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntObjectMap.java
deleted file mode 100644
index e7095151a..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntObjectMap.java
+++ /dev/null
@@ -1,51 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import org.jetbrains.annotations.Nullable;
-
-import java.util.Map;
-
-/**
- * Very simple wrapping interface to either be implemented by a HashMap or FastUtil's OpenHashMap.
- *
- * @param <V> Object value type
- */
-public interface IntObjectMap<V> {
-
-    /**
-     * @see java.util.HashMap#get(Object)
-     */
-    @Nullable
-    V get(int key);
-
-    /**
-     * @see java.util.HashMap#getOrDefault(Object, Object)
-     */
-    @Nullable
-    V getOrDefault(int key, V def);
-
-    /**
-     * @see java.util.HashMap#containsKey(Object)
-     */
-    boolean containsKey(int key);
-
-    /**
-     * @see java.util.HashMap#put(Object, Object)
-     */
-    @Nullable
-    V put(int key, V value);
-
-    /**
-     * @see java.util.HashMap#remove(Object)
-     */
-    @Nullable
-    V remove(int key);
-
-    /**
-     * Returns the underlying map for usage of not implemented methods of this class.
-     *
-     * @return original map
-     * @deprecated will cause wrapping if it is a FastUtil collection
-     */
-    @Deprecated
-    Map<Integer, V> getMap();
-}
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntSet.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntSet.java
deleted file mode 100644
index 74ec51cb9..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/IntSet.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-/**
- * Very simple wrapping interface to either be implemented by a HashSet or FastUtil's OpenHashSet.
- */
-public interface IntSet {
-
-    /**
-     * @see java.util.HashSet#contains(Object)
-     */
-    boolean contains(int key);
-
-    /**
-     * @see java.util.HashSet#add(Object)
-     */
-    boolean add(int key);
-
-    /**
-     * @see java.util.HashSet#remove(Object)
-     */
-    boolean remove(int key);
-}
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntMap.java
deleted file mode 100644
index fd10fa3a4..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntMap.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import it.unimi.dsi.fastutil.ints.Int2IntMap;
-import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
-
-import java.util.Map;
-
-final class WrappedFUIntMap implements IntMap {
-    private final Int2IntMap map;
-
-    WrappedFUIntMap(Map<Integer, Integer> originalMap) {
-        this.map = new Int2IntOpenHashMap(originalMap);
-    }
-
-    WrappedFUIntMap(int size) {
-        this.map = new Int2IntOpenHashMap(size);
-    }
-
-    @Override
-    public int getOrDefault(int key, int def) {
-        return map.getOrDefault(key, def);
-    }
-
-    @Override
-    public boolean containsKey(int key) {
-        return map.containsKey(key);
-    }
-
-    @Override
-    public int put(int key, int value) {
-        return map.put(key, value);
-    }
-
-    @Override
-    public int remove(int key) {
-        return map.remove(key);
-    }
-
-    @Override
-    public Map<Integer, Integer> getMap() {
-        return map;
-    }
-}
\ No newline at end of file
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntObjectMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntObjectMap.java
deleted file mode 100644
index 175aeb50c..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntObjectMap.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
-import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
-
-import java.util.Map;
-
-final class WrappedFUIntObjectMap<V> implements IntObjectMap<V> {
-    private final Int2ObjectMap<V> map;
-
-    WrappedFUIntObjectMap(Map<Integer, V> originalMap) {
-        this.map = new Int2ObjectOpenHashMap<>(originalMap);
-    }
-
-    WrappedFUIntObjectMap(int size) {
-        this.map = new Int2ObjectOpenHashMap(size);
-    }
-
-    @Override
-    public V get(int key) {
-        return map.get(key);
-    }
-
-    @Override
-    public V getOrDefault(int key, V def) {
-        return map.getOrDefault(key, def);
-    }
-
-    @Override
-    public boolean containsKey(int key) {
-        return map.containsKey(key);
-    }
-
-    @Override
-    public V put(int key, V value) {
-        return map.put(key, value);
-    }
-
-    @Override
-    public V remove(int key) {
-        return map.remove(key);
-    }
-
-    @Override
-    public Map<Integer, V> getMap() {
-        return map;
-    }
-}
\ No newline at end of file
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntSet.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntSet.java
deleted file mode 100644
index 315ee6b17..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedFUIntSet.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
-
-import java.util.Set;
-
-final class WrappedFUIntSet implements IntSet {
-    private final it.unimi.dsi.fastutil.ints.IntSet set;
-
-    WrappedFUIntSet(Set<Integer> originalSet) {
-        this.set = new IntOpenHashSet(originalSet);
-    }
-
-    WrappedFUIntSet(int size) {
-        this.set = new IntOpenHashSet(size);
-    }
-
-    @Override
-    public boolean contains(int key) {
-        return set.contains(key);
-    }
-
-    @Override
-    public boolean add(int key) {
-        return set.add(key);
-    }
-
-    @Override
-    public boolean remove(int key) {
-        return set.remove(key);
-    }
-}
\ No newline at end of file
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntMap.java
deleted file mode 100644
index 483a1f9d3..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntMap.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import java.util.HashMap;
-import java.util.Map;
-
-final class WrappedIntMap implements IntMap {
-    private final Map<Integer, Integer> map;
-
-    WrappedIntMap(Map<Integer, Integer> originalMap) {
-        this.map = originalMap;
-    }
-
-    WrappedIntMap(int size) {
-        this.map = new HashMap<>(size);
-    }
-
-    @Override
-    public int getOrDefault(int key, int def) {
-        return map.getOrDefault(key, def);
-    }
-
-    @Override
-    public boolean containsKey(int key) {
-        return map.containsKey(key);
-    }
-
-    @Override
-    public int put(int key, int value) {
-        Integer oldValue = map.put(key, value);
-        return oldValue != null ? oldValue : -1;
-    }
-
-    @Override
-    public int remove(int key) {
-        Integer removed = map.remove(key);
-        return removed != null ? removed : -1;
-    }
-
-    @Override
-    public Map<Integer, Integer> getMap() {
-        return map;
-    }
-}
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntObjectMap.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntObjectMap.java
deleted file mode 100644
index 34e6ac61c..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntObjectMap.java
+++ /dev/null
@@ -1,46 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import java.util.HashMap;
-import java.util.Map;
-
-final class WrappedIntObjectMap<V> implements IntObjectMap<V> {
-    private final Map<Integer, V> map;
-
-    WrappedIntObjectMap(Map<Integer, V> originalMap) {
-        this.map = originalMap;
-    }
-
-    WrappedIntObjectMap(int size) {
-        this.map = new HashMap<>(size);
-    }
-
-    @Override
-    public V get(int key) {
-        return map.get(key);
-    }
-
-    @Override
-    public V getOrDefault(int key, V def) {
-        return map.getOrDefault(key, def);
-    }
-
-    @Override
-    public boolean containsKey(int key) {
-        return map.containsKey(key);
-    }
-
-    @Override
-    public V put(int key, V value) {
-        return map.put(key, value);
-    }
-
-    @Override
-    public V remove(int key) {
-        return map.remove(key);
-    }
-
-    @Override
-    public Map<Integer, V> getMap() {
-        return map;
-    }
-}
\ No newline at end of file
diff --git a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntSet.java b/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntSet.java
deleted file mode 100644
index 1730e195c..000000000
--- a/common/src/main/java/us/myles/ViaVersion/util/fastutil/WrappedIntSet.java
+++ /dev/null
@@ -1,31 +0,0 @@
-package us.myles.ViaVersion.util.fastutil;
-
-import java.util.HashSet;
-import java.util.Set;
-
-final class WrappedIntSet implements IntSet {
-    private final Set<Integer> set;
-
-    WrappedIntSet(Set<Integer> originalSet) {
-        this.set = originalSet;
-    }
-
-    WrappedIntSet(int size) {
-        this.set = new HashSet<>(size);
-    }
-
-    @Override
-    public boolean contains(int key) {
-        return set.contains(key);
-    }
-
-    @Override
-    public boolean add(int key) {
-        return set.add(key);
-    }
-
-    @Override
-    public boolean remove(int key) {
-        return set.remove(key);
-    }
-}
diff --git a/jar/pom.xml b/jar/pom.xml
index 621d022fe..9ec8fe221 100644
--- a/jar/pom.xml
+++ b/jar/pom.xml
@@ -73,7 +73,44 @@
                 <configuration>
                     <createDependencyReducedPom>false</createDependencyReducedPom>
                     <minimizeJar>false</minimizeJar>
+                    <filters>
+                        <filter>
+                            <artifact>it.unimi.dsi:fastutil</artifact>
+                            <includes>
+                                <!-- We only want int and Object maps -->
+                                <include>it/unimi/dsi/fastutil/ints/*</include>
+                                <include>it/unimi/dsi/fastutil/objects/*</include>
+                                <include>it/unimi/dsi/fastutil/*.class</include>
+                            </includes>
+                            <excludes>
+                                <!-- Object types -->
+                                <exclude>it/unimi/dsi/fastutil/*/*Reference*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Boolean*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Byte*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Short*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Float*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Double*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Long*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Char*</exclude>
+                                <!-- Map types -->
+                                <exclude>it/unimi/dsi/fastutil/*/*Custom*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Linked*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Sorted*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Tree*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Heap*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Queue*</exclude>
+                                <!-- Crossing fingers -->
+                                <exclude>it/unimi/dsi/fastutil/*/*Big*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Synchronized*</exclude>
+                                <exclude>it/unimi/dsi/fastutil/*/*Unmodifiable*</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
                     <relocations>
+                        <relocation>
+                            <pattern>it.unimi.dsi.fastutil</pattern>
+                            <shadedPattern>us.myles.viaversion.libs.fastutil</shadedPattern>
+                        </relocation>
                         <relocation>
                             <pattern>com.github.steveice10.opennbt</pattern>
                             <shadedPattern>us.myles.viaversion.libs.opennbt</shadedPattern>