diff --git a/src/main/java/net/raphimc/viaproxy/injection/TransformerDowngrader.java b/src/main/java/net/raphimc/viaproxy/injection/TransformerDowngrader.java
new file mode 100644
index 0000000..1d0877a
--- /dev/null
+++ b/src/main/java/net/raphimc/viaproxy/injection/TransformerDowngrader.java
@@ -0,0 +1,57 @@
+/*
+ * This file is part of ViaProxy - https://github.com/RaphiMC/ViaProxy
+ * Copyright (C) 2021-2024 RK_01/RaphiMC and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.raphimc.viaproxy.injection;
+
+import net.lenni0451.classtransform.transformer.IAnnotationHandlerPreprocessor;
+import net.lenni0451.classtransform.utils.ASMUtils;
+import net.lenni0451.classtransform.utils.Sneaky;
+import org.objectweb.asm.tree.ClassNode;
+import xyz.wagyourtail.jvmdg.runtime.ClassDowngradingAgent;
+
+import java.lang.instrument.IllegalClassFormatException;
+
+public class TransformerDowngrader implements IAnnotationHandlerPreprocessor {
+
+    private final ClassLoader classLoader;
+    private final ClassDowngradingAgent downgrader = new ClassDowngradingAgent();
+
+    public TransformerDowngrader(final ClassLoader classLoader) {
+        this.classLoader = classLoader;
+    }
+
+    @Override
+    public void process(final ClassNode node) {
+    }
+
+    @Override
+    public ClassNode replace(final ClassNode node) {
+        final byte[] bytes = ASMUtils.toStacklessBytes(node);
+        try {
+            final byte[] transformed = this.downgrader.transform(this.classLoader, node.name, null, null, bytes);
+            if (transformed != null) {
+                return ASMUtils.fromBytes(transformed);
+            } else {
+                return node;
+            }
+        } catch (IllegalClassFormatException e) {
+            Sneaky.sneakyThrow(e);
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java b/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java
index 4430f94..e440111 100644
--- a/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java
@@ -25,6 +25,7 @@ import net.lenni0451.classtransform.utils.loader.InjectionClassLoader;
 import net.lenni0451.classtransform.utils.tree.IClassProvider;
 import net.lenni0451.reflect.stream.RStream;
 import net.raphimc.viaproxy.ViaProxy;
+import net.raphimc.viaproxy.injection.TransformerDowngrader;
 import net.raphimc.viaproxy.util.logging.Logger;
 import org.objectweb.asm.Opcodes;
 import org.yaml.snakeyaml.Yaml;
@@ -104,6 +105,7 @@ public class PluginManager {
             if (nativeClassVersion < Opcodes.V17) {
                 System.setProperty(Constants.ALLOW_MAVEN_LOOKUP, "false");
                 transformerManager.addClassFileTransformer(classLoader, new ClassDowngradingAgent());
+                transformerManager.addTransformerPreprocessor(new TransformerDowngrader(classLoader));
             }
         } catch (Throwable e) {
             Logger.LOGGER.error("Failed to setup class downgrading", e);