diff --git a/native/src/main/java/net/md_5/bungee/FallbackCipher.java b/native/src/main/java/net/md_5/bungee/FallbackCipher.java
index 3c9ee078..1b2fc267 100644
--- a/native/src/main/java/net/md_5/bungee/FallbackCipher.java
+++ b/native/src/main/java/net/md_5/bungee/FallbackCipher.java
@@ -11,9 +11,9 @@ import java.security.GeneralSecurityException;
 public class FallbackCipher implements BungeeCipher
 {
 
-    private Cipher cipher;
-    private ThreadLocal<byte[]> heapInLocal = new EmptyByteThreadLocal();
-    private ThreadLocal<byte[]> heapOutLocal = new EmptyByteThreadLocal();
+    private final Cipher cipher;
+    private static final ThreadLocal<byte[]> heapInLocal = new EmptyByteThreadLocal();
+    private static final ThreadLocal<byte[]> heapOutLocal = new EmptyByteThreadLocal();
 
     private static class EmptyByteThreadLocal extends ThreadLocal<byte[]>
     {