diff --git a/build.gradle.kts b/build.gradle.kts
index 29452147..c9a8186f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
 
 allprojects {
     group = "com.viaversion"
-    version = "4.1.0-21w38a-SNAPSHOT"
+    version = "4.1.0-21w39a-SNAPSHOT"
     description = "Allow older clients to join newer server versions."
 }
 
diff --git a/common/src/main/java/com/viaversion/viabackwards/api/data/VBMappingDataLoader.java b/common/src/main/java/com/viaversion/viabackwards/api/data/VBMappingDataLoader.java
index 4625d9b6..f27bfec8 100644
--- a/common/src/main/java/com/viaversion/viabackwards/api/data/VBMappingDataLoader.java
+++ b/common/src/main/java/com/viaversion/viabackwards/api/data/VBMappingDataLoader.java
@@ -134,7 +134,7 @@ public class VBMappingDataLoader {
     }
 
     public static Int2ObjectMap<MappedItem> loadItemMappings(JsonObject oldMapping, JsonObject newMapping, JsonObject diffMapping, boolean warnOnMissing) {
-        Int2ObjectMap<MappedItem> itemMapping = new Int2ObjectOpenHashMap<>(diffMapping.size(), 1F);
+        Int2ObjectMap<MappedItem> itemMapping = new Int2ObjectOpenHashMap<>(diffMapping.size(), 0.99F);
         Object2IntMap<String> newIdenfierMap = MappingDataLoader.indexedObjectToMap(newMapping);
         Object2IntMap<String> oldIdenfierMap = MappingDataLoader.indexedObjectToMap(oldMapping);
         for (Map.Entry<String, JsonElement> entry : diffMapping.entrySet()) {
diff --git a/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriterBase.java b/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriterBase.java
index 382e5f26..5b3f6df8 100644
--- a/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriterBase.java
+++ b/common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriterBase.java
@@ -147,7 +147,7 @@ public abstract class EntityRewriterBase<T extends BackwardsProtocol> extends En
     @Override
     public <E extends Enum<E> & EntityType> void mapTypes(EntityType[] oldTypes, Class<E> newTypeClass) {
         if (typeMappings == null) {
-            typeMappings = new Int2IntOpenHashMap(oldTypes.length, 1F);
+            typeMappings = new Int2IntOpenHashMap(oldTypes.length, 0.99F);
             typeMappings.defaultReturnValue(-1);
         }
         for (EntityType oldType : oldTypes) {
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/PotionSplashHandler.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/PotionSplashHandler.java
index e3f61e4b..d738cf82 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/PotionSplashHandler.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/PotionSplashHandler.java
@@ -22,7 +22,7 @@ import com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
 
 public class PotionSplashHandler {
 
-    private static final Int2IntMap DATA = new Int2IntOpenHashMap(14, 1F);
+    private static final Int2IntMap DATA = new Int2IntOpenHashMap(14, 0.99F);
 
     static {
         DATA.defaultReturnValue(-1);
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/data/MapColorMapping.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/data/MapColorMapping.java
index 0fe74e99..f05981a8 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/data/MapColorMapping.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/data/MapColorMapping.java
@@ -21,7 +21,7 @@ import com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
 
 public class MapColorMapping {
-    private static final Int2IntMap MAPPING = new Int2IntOpenHashMap(64, 1F);
+    private static final Int2IntMap MAPPING = new Int2IntOpenHashMap(64, 0.99F);
 
     static {
         MAPPING.defaultReturnValue(-1);
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/FlowerPotHandler.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/FlowerPotHandler.java
index 08ed82b2..30bc8348 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/FlowerPotHandler.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/FlowerPotHandler.java
@@ -29,7 +29,7 @@ import com.viaversion.viaversion.util.Pair;
 
 public class FlowerPotHandler implements BackwardsBlockEntityProvider.BackwardsBlockEntityHandler {
 
-    private static final Int2ObjectMap<Pair<String, Byte>> FLOWERS = new Int2ObjectOpenHashMap<>(22, 1F);
+    private static final Int2ObjectMap<Pair<String, Byte>> FLOWERS = new Int2ObjectOpenHashMap<>(22, 0.99F);
     private static final Pair<String, Byte> AIR = new Pair<>("minecraft:air", (byte) 0);
 
     static {
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/PaintingMapping.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/PaintingMapping.java
index 52fdb51a..5a3b2d68 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/PaintingMapping.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/PaintingMapping.java
@@ -21,7 +21,7 @@ import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectMap;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
 
 public class PaintingMapping {
-    private static final Int2ObjectMap<String> PAINTINGS = new Int2ObjectOpenHashMap<>(26, 1F);
+    private static final Int2ObjectMap<String> PAINTINGS = new Int2ObjectOpenHashMap<>(26, 0.99F);
 
     public static void init() {
         add("Kebab");
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 11635604..601bc815 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,14 +3,14 @@ metadata.format.version = "1.1"
 [versions]
 
 # ViaVersion
-viaver = "4.1.0-21w38a-SNAPSHOT"
+viaver = "4.1.0-21w39a-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"
 guava = "17.0"
 log4j = "2.8.1"
 
-checkerQual = "3.14.0"
+checkerQual = "3.18.0"
 
 # Platforms
 paper = "1.16.5-R0.1-SNAPSHOT"