diff --git a/patches/net/minecraft/client/main/Main.java.patch b/patches/net/minecraft/client/main/Main.java.patch
index 352781b7..b5df7d14 100644
--- a/patches/net/minecraft/client/main/Main.java.patch
+++ b/patches/net/minecraft/client/main/Main.java.patch
@@ -1,14 +1,15 @@
 --- a/net/minecraft/client/main/Main.java
 +++ b/net/minecraft/client/main/Main.java
-@@ -1,5 +1,7 @@
+@@ -1,5 +1,8 @@
  package net.minecraft.client.main;
  
 +import carpet.spark.CarpetSparkAccess;
++import carpet.utils.Log4j2JndiPatch;
 +import carpet.worldedit.CarpetWorldEditAccess;
  import com.google.gson.Gson;
  import com.google.gson.GsonBuilder;
  import com.mojang.authlib.properties.PropertyMap;
-@@ -70,6 +72,11 @@
+@@ -70,6 +73,11 @@
              System.out.println("Completely ignored arguments: " + list);
          }
  
@@ -20,3 +21,13 @@
          String s = func_206236_a(optionset, optionspec5);
          Proxy proxy = Proxy.NO_PROXY;
  
+@@ -162,6 +170,9 @@
+ 
+     static
+     {
++        // TISCM LOG4J2-3201 PATCH
++        Log4j2JndiPatch.patch();
++
+         System.setProperty("java.awt.headless", "true");
+     }
+ }
diff --git a/patches/net/minecraft/server/MinecraftServer.java.patch b/patches/net/minecraft/server/MinecraftServer.java.patch
index 7044cbe8..6abd12a9 100644
--- a/patches/net/minecraft/server/MinecraftServer.java.patch
+++ b/patches/net/minecraft/server/MinecraftServer.java.patch
@@ -1,6 +1,6 @@
 --- a/net/minecraft/server/MinecraftServer.java
 +++ b/net/minecraft/server/MinecraftServer.java
-@@ -1,5 +1,19 @@
+@@ -1,5 +1,20 @@
  package net.minecraft.server;
  
 +import carpet.CarpetServer;
@@ -14,13 +14,14 @@
 +import carpet.settings.CarpetSettings;
 +import carpet.spark.CarpetSparkAccess;
 +import carpet.utils.CarpetProfiler;
++import carpet.utils.Log4j2JndiPatch;
 +import carpet.utils.Messenger;
 +import carpet.utils.TISCMConfig;
 +import carpet.worldedit.CarpetWorldEditAccess;
  import com.google.common.base.Stopwatch;
  import com.google.common.collect.Lists;
  import com.google.common.collect.Maps;
-@@ -178,6 +192,7 @@
+@@ -178,6 +193,7 @@
      public final Queue < FutureTask<? >> futureTaskQueue = Queues.newConcurrentLinkedQueue();
      private Thread serverThread;
      private long serverTime = Util.milliTime();
@@ -28,7 +29,7 @@
      @OnlyIn(Dist.CLIENT)
      private boolean worldIconSet;
      private final IReloadableResourceManager resourceManager = new SimpleReloadableResourceManager(ResourcePackType.SERVER_DATA);
-@@ -212,6 +227,8 @@
+@@ -212,6 +228,8 @@
          this.resourceManager.addReloadListener(this.lootTableManager);
          this.resourceManager.addReloadListener(this.functionManager);
          this.resourceManager.addReloadListener(this.advancementManager);
@@ -37,7 +38,7 @@
      }
  
      public abstract boolean init() throws IOException;
-@@ -571,7 +588,13 @@
+@@ -571,7 +589,13 @@
      public void stopServer()
      {
          LOGGER.info("Stopping server");
@@ -51,7 +52,7 @@
          if (this.getNetworkSystem() != null)
          {
              this.getNetworkSystem().terminateEndpoints();
-@@ -639,34 +662,64 @@
+@@ -639,34 +663,64 @@
      {
          try
          {
@@ -133,7 +134,7 @@
                  }
              }
              else
-@@ -782,7 +835,16 @@
+@@ -782,7 +836,16 @@
      {
          long i = Util.nanoTime();
          ++this.tickCounter;
@@ -150,7 +151,7 @@
          if (this.startProfiling)
          {
              this.startProfiling = false;
-@@ -790,6 +852,9 @@
+@@ -790,6 +853,9 @@
          }
  
          this.profiler.startSection("root");
@@ -160,7 +161,7 @@
          this.updateTimeLightAndEntities(hasTimeLeft);
  
          if (i - this.nanoTimeSinceStatusRefresh >= 5000000000L)
-@@ -810,10 +875,26 @@
+@@ -810,10 +876,26 @@
  
          if (this.tickCounter % 900 == 0)
          {
@@ -187,7 +188,7 @@
          }
  
          this.profiler.startSection("snooper");
-@@ -829,16 +910,30 @@
+@@ -829,16 +911,30 @@
          }
  
          this.profiler.endSection();
@@ -218,7 +219,7 @@
          FutureTask<?> futuretask;
  
          while ((futuretask = this.futureTaskQueue.poll()) != null)
-@@ -847,6 +942,7 @@
+@@ -847,6 +943,7 @@
          }
  
          this.profiler.endStartSection("commandFunctions");
@@ -226,7 +227,7 @@
          this.getFunctionManager().tick();
          this.profiler.endStartSection("levels");
  
-@@ -870,6 +966,7 @@
+@@ -870,6 +967,7 @@
  
                  this.profiler.startSection("tick");
  
@@ -234,7 +235,7 @@
                  try
                  {
                      worldserver.tick(hasTimeLeft);
-@@ -878,9 +975,15 @@
+@@ -878,9 +976,15 @@
                  {
                      CrashReport crashreport = CrashReport.makeCrashReport(throwable1, "Exception ticking world");
                      worldserver.fillCrashReport(crashreport);
@@ -251,7 +252,7 @@
                  try
                  {
                      worldserver.tickEntities();
-@@ -889,7 +992,12 @@
+@@ -889,7 +993,12 @@
                  {
                      CrashReport crashreport1 = CrashReport.makeCrashReport(throwable, "Exception ticking world entities");
                      worldserver.fillCrashReport(crashreport1);
@@ -265,7 +266,7 @@
                  }
  
                  this.profiler.endSection();
-@@ -905,10 +1013,13 @@
+@@ -905,10 +1014,13 @@
              }))[this.tickCounter % 100] = Util.nanoTime() - i;
          }
  
@@ -279,7 +280,20 @@
          this.profiler.endStartSection("tickables");
  
          for (int j = 0; j < this.tickables.size(); ++j)
-@@ -1004,6 +1115,11 @@
+@@ -929,6 +1041,12 @@
+         this.tickables.add(tickable);
+     }
+ 
++    static
++    {
++        // TISCM LOG4J2-3201 PATCH
++        Log4j2JndiPatch.patch();
++    }
++
+     public static void main(String[] p_main_0_)
+     {
+         Bootstrap.register();
+@@ -1004,6 +1122,11 @@
                  }
              }
  
@@ -291,7 +305,7 @@
              YggdrasilAuthenticationService yggdrasilauthenticationservice = new YggdrasilAuthenticationService(Proxy.NO_PROXY, UUID.randomUUID().toString());
              MinecraftSessionService minecraftsessionservice = yggdrasilauthenticationservice.createMinecraftSessionService();
              GameProfileRepository gameprofilerepository = yggdrasilauthenticationservice.createProfileRepository();
-@@ -1142,7 +1258,8 @@
+@@ -1142,7 +1265,8 @@
  
      public String getServerModName()
      {
@@ -301,7 +315,7 @@
      }
  
      public CrashReport addServerInfoToCrashReport(CrashReport report)
-@@ -1605,6 +1722,12 @@
+@@ -1605,6 +1729,12 @@
      {
          return this.serverTime;
      }
@@ -314,7 +328,7 @@
  
      public Thread getServerThread()
      {
-@@ -1825,4 +1948,17 @@
+@@ -1825,4 +1955,17 @@
              return 0;
          }
      }
diff --git a/src/main/java/carpet/utils/Log4j2JndiPatch.java b/src/main/java/carpet/utils/Log4j2JndiPatch.java
new file mode 100644
index 00000000..a0fd8404
--- /dev/null
+++ b/src/main/java/carpet/utils/Log4j2JndiPatch.java
@@ -0,0 +1,33 @@
+package carpet.utils;
+
+import org.apache.logging.log4j.core.LoggerContext;
+
+/**
+ * Fix from 1.18.1-rc3
+ */
+public class Log4j2JndiPatch
+{
+	private static final LoggerContext loggerContext = LoggerContext.getContext(false);
+
+	public static void patch()
+	{
+		// doesn't work before log4j2 2.10
+		// System.setProperty("log4j2.formatMsgNoLookups", "true");
+
+		loggerContext.addPropertyChangeListener(event -> applyFix());
+		applyFix();
+	}
+
+	private static void applyFix()
+	{
+		try
+		{
+			loggerContext.getConfiguration().getStrSubstitutor().setVariableResolver(null);
+		}
+		catch (Throwable throwable)
+		{
+			throwable.printStackTrace();
+			throw new RuntimeException("JNDI patch failed");
+		}
+	}
+}