diff --git a/.gitignore b/.gitignore
index ec376bb8..7eae63f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .idea
-target
\ No newline at end of file
+target
+dependency-reduced-pom.xml
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 230382a6..64abd50d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,6 +44,14 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 
diff --git a/src/de/steamwar/bungeecore/BungeeCore.java b/src/de/steamwar/bungeecore/BungeeCore.java
index 0ddcc56b..186e76bb 100644
--- a/src/de/steamwar/bungeecore/BungeeCore.java
+++ b/src/de/steamwar/bungeecore/BungeeCore.java
@@ -4,8 +4,6 @@ import de.steamwar.bungeecore.arenasystem.ArenaMode;
 import de.steamwar.bungeecore.arenasystem.ArenaSystem;
 import de.steamwar.bungeecore.bausystem.BauSystem;
 import de.steamwar.bungeecore.commands.*;
-import de.steamwar.bungeecore.sql.Bauwelt;
-import de.steamwar.bungeecore.sql.BauweltMember;
 import de.steamwar.bungeecore.sql.WarkingUser;
 import de.steamwar.bungeecore.sql.sql;
 import net.md_5.bungee.api.config.ServerInfo;
@@ -125,11 +123,7 @@ public class BungeeCore extends Plugin {
             }
         }, 10, 10, TimeUnit.MINUTES);
 
-        getProxy().getScheduler().schedule(this, () -> {
-            WarkingUser.clearCache();
-            Bauwelt.clearCache();
-            BauweltMember.clearCache();
-        }, 1, 1, TimeUnit.HOURS);
+        getProxy().getScheduler().schedule(this, WarkingUser::clearCache, 1, 1, TimeUnit.HOURS);
     }
 
     @Override
diff --git a/src/de/steamwar/bungeecore/sql/Bauwelt.java b/src/de/steamwar/bungeecore/sql/Bauwelt.java
index 49b15d80..13a6ad9e 100644
--- a/src/de/steamwar/bungeecore/sql/Bauwelt.java
+++ b/src/de/steamwar/bungeecore/sql/Bauwelt.java
@@ -3,8 +3,6 @@ package de.steamwar.bungeecore.sql;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.UUID;
 
 public class Bauwelt {
@@ -13,15 +11,12 @@ public class Bauwelt {
     private boolean TNTDmg;
     private boolean FireDmg;
 
-    private static List<Bauwelt> welten = new ArrayList<>();
-
     private Bauwelt(int userID, boolean tntDmg, boolean fireDmg, boolean updateDB){
         UserID = userID;
         TNTDmg = tntDmg;
         FireDmg = fireDmg;
         if(updateDB)
             updateDB();
-        welten.add(this);
     }
 
     public Bauwelt(int userID, boolean tntDmg, boolean fireDmg){
@@ -46,9 +41,6 @@ public class Bauwelt {
     }
 
     public static Bauwelt getBauwelt(int userId){
-        for(Bauwelt welt : welten)
-            if(welt.UserID == userId)
-                return welt;
         ResultSet bauwelt = sql.select("SELECT * FROM Bauwelt WHERE UserID = '" + userId + "'");
         try {
             if(bauwelt == null || !bauwelt.next()){
@@ -63,10 +55,6 @@ public class Bauwelt {
         return null;
     }
 
-    public static void clearCache(){
-        welten.clear();
-    }
-
     public int getUserID() {
         return UserID;
     }
diff --git a/src/de/steamwar/bungeecore/sql/BauweltMember.java b/src/de/steamwar/bungeecore/sql/BauweltMember.java
index 776db97c..523947ac 100644
--- a/src/de/steamwar/bungeecore/sql/BauweltMember.java
+++ b/src/de/steamwar/bungeecore/sql/BauweltMember.java
@@ -13,7 +13,6 @@ public class BauweltMember{
     private boolean WorldEdit;
     private boolean World;
 
-    private static final List<BauweltMember> members = new ArrayList<>();
 
     private BauweltMember(int ownerID, int memberID, boolean build, boolean worldEdit, boolean world, boolean updateDB){
         BauweltID = ownerID;
@@ -23,7 +22,6 @@ public class BauweltMember{
         World = world;
         if(updateDB)
             updateDB();
-        members.add(this);
     }
 
     public BauweltMember(int ownerID, int memberID, boolean build, boolean worldEdit, boolean world){
@@ -36,7 +34,6 @@ public class BauweltMember{
 
     public void remove(){
         sql.update("DELETE FROM BauweltMember WHERE BauweltID = " + BauweltID + " AND MemberID = " + MemberID);
-        members.remove(this);
     }
 
     private void updateDB(){
@@ -53,9 +50,6 @@ public class BauweltMember{
     }
 
     public static BauweltMember getBauMember(int ownerID, int memberID){
-        for(BauweltMember member : members)
-            if(member.BauweltID == ownerID && member.MemberID == memberID)
-                return member;
         ResultSet member = sql.select("SELECT * FROM BauweltMember WHERE BauweltID = '" + ownerID + "' AND MemberID = '" + memberID + "'");
         try {
             if(member == null || !member.next()){
@@ -71,10 +65,6 @@ public class BauweltMember{
         return null;
     }
 
-    public static void clearCache(){
-        members.clear();
-    }
-
     public static List<BauweltMember> getMembers(UUID bauweltID){
         return getMembers(WarkingUser.get(bauweltID).getId());
     }