diff --git a/CommonCore b/CommonCore
index 74744784..595df40e 160000
--- a/CommonCore
+++ b/CommonCore
@@ -1 +1 @@
-Subproject commit 7474478489da42735a32e84b3f91144c64847e30
+Subproject commit 595df40e1e9078c310cbbb4bbded07744c361f15
diff --git a/src/de/steamwar/bungeecore/listeners/mods/Fabric.java b/src/de/steamwar/bungeecore/listeners/mods/Fabric.java
index 9bed4e08..a7285231 100644
--- a/src/de/steamwar/bungeecore/listeners/mods/Fabric.java
+++ b/src/de/steamwar/bungeecore/listeners/mods/Fabric.java
@@ -43,14 +43,30 @@ import java.util.concurrent.TimeUnit;
 
 public class Fabric extends BasicListener {
 
-    private final Set<String> neededMods = new HashSet<>();
+    public static void remove(ProxiedPlayer player) {
+        Storage.fabricCheckedPlayers.remove(player);
+        synchronized (Storage.fabricExpectPluginMessage) {
+            Storage.fabricExpectPluginMessage.remove(player);
+        }
+    }
 
-    {
+    private static final HashSet<String> ppCircumventerList = new HashSet<>();
+    static {
+        ppCircumventerList.add("java");
+        ppCircumventerList.add("minecraft");
+        ppCircumventerList.add("org_joml_joml");
+        ppCircumventerList.add("steamwarmodsender");
+    }
+
+    private static final Set<String> neededMods = new HashSet<>();
+    static {
         neededMods.add("java");
         neededMods.add("minecraft");
         neededMods.add("fabricloader");
         neededMods.add("steamwarmodsender");
+    }
 
+    {
         BungeeCord.getInstance().getScheduler().schedule(BungeeCore.get(), () -> {
             synchronized (Storage.fabricExpectPluginMessage) {
                 for (Map.Entry<ProxiedPlayer, Long> entry : Storage.fabricExpectPluginMessage.entrySet()) {
@@ -112,7 +128,7 @@ public class Fabric extends BasicListener {
         JsonArray array;
 
         try {
-            array = new JsonParser().parse(dataString).getAsJsonArray();
+            array = JsonParser.parseString(dataString).getAsJsonArray();
         }catch (JsonSyntaxException exception) {
             logMessage(user, "Invalid json", dataString);
             return;
@@ -123,21 +139,28 @@ public class Fabric extends BasicListener {
         }
 
         boolean neededMods = neededModsContained(mods);
-        if(Utils.handleMods(player,mods) && neededMods) {
-            if (Storage.fabricCheckedPlayers.containsKey(player)) {
-                long current = Storage.fabricCheckedPlayers.get(player);
-                if (current != dataString.hashCode()) {
-                    logMessage(user, "Mods changed during runtime", dataString);
-                    return;
-                }
-            } else {
-                Message.send("MODIFICATION_CHECK_SUCCESS", player);
-                Storage.fabricCheckedPlayers.put(player, dataString.hashCode());
-            }
-            Storage.fabricPlayers.remove(player);
-        } else if (!neededMods) {
+        if(!neededMods) {
             logMessage(user, "Needed mods are not contained", dataString);
+            return;
         }
+
+        if(ppCircumventerCheck(mods))
+            logMessage(user, "PP circumventer suspicion", dataString);
+
+        if(!Utils.handleMods(player,mods))
+            return;
+
+        if (Storage.fabricCheckedPlayers.containsKey(player)) {
+            long current = Storage.fabricCheckedPlayers.get(player);
+            if (current != dataString.hashCode()) {
+                logMessage(user, "Mods changed during runtime", dataString);
+                return;
+            }
+        } else {
+            Message.send("MODIFICATION_CHECK_SUCCESS", player);
+            Storage.fabricCheckedPlayers.put(player, dataString.hashCode());
+        }
+        Storage.fabricPlayers.remove(player);
     }
 
     @EventHandler
@@ -155,14 +178,17 @@ public class Fabric extends BasicListener {
                 .count() == neededMods.size();
     }
 
-    public void logMessage(SteamwarUser user, String reason, String data) {
+    private void logMessage(SteamwarUser user, String reason, String data) {
         SWException.log("FabricModSender " + user.getUserName() + ": " + reason, data);
     }
 
-    public static void remove(ProxiedPlayer player) {
-        Storage.fabricCheckedPlayers.remove(player);
-        synchronized (Storage.fabricExpectPluginMessage) {
-            Storage.fabricExpectPluginMessage.remove(player);
+    private boolean ppCircumventerCheck(List<Mod> mods) {
+        for(Mod mod : mods) {
+            String name = mod.getModName();
+            if(!name.startsWith("fabric") && !ppCircumventerList.contains(name))
+                return false;
         }
+
+        return true;
     }
 }