diff --git a/src/main/java/gate/creole/Plugin.java b/src/main/java/gate/creole/Plugin.java
index e795639..af68184 100644
--- a/src/main/java/gate/creole/Plugin.java
+++ b/src/main/java/gate/creole/Plugin.java
@@ -1082,7 +1082,7 @@ public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
       // we've found a CreoleResource annotation on this class
       if(desc.equals(CREOLE_RESOURCE_DESC)) {
         foundCreoleResource = true;
-        return new AnnotationVisitor(Opcodes.ASM5) {
+        return new AnnotationVisitor(Opcodes.ASM9) {
           @Override
           public void visit(String name, Object value) {
             if(name.equals("name") && resInfo.getResourceName() == null) {
diff --git a/src/main/java/gate/util/asm/commons/EmptyVisitor.java b/src/main/java/gate/util/asm/commons/EmptyVisitor.java
index 850053b..cf5ad6c 100644
--- a/src/main/java/gate/util/asm/commons/EmptyVisitor.java
+++ b/src/main/java/gate/util/asm/commons/EmptyVisitor.java
@@ -10,7 +10,7 @@
 
 public class EmptyVisitor extends ClassVisitor {
 
-  AnnotationVisitor av = new AnnotationVisitor(Opcodes.ASM5) {
+  AnnotationVisitor av = new AnnotationVisitor(Opcodes.ASM9) {
 
       @Override
       public AnnotationVisitor visitAnnotation(String name, String desc) {
@@ -24,7 +24,7 @@ public AnnotationVisitor visitArray(String name) {
   };
 
   public EmptyVisitor() {
-      super(Opcodes.ASM5);
+      super(Opcodes.ASM9);
   }
 
   @Override
@@ -41,7 +41,7 @@ public AnnotationVisitor visitTypeAnnotation(int typeRef,
   @Override
   public FieldVisitor visitField(int access, String name, String desc,
           String signature, Object value) {
-      return new FieldVisitor(Opcodes.ASM5) {
+      return new FieldVisitor(Opcodes.ASM9) {
 
           @Override
           public AnnotationVisitor visitAnnotation(String desc,
@@ -60,7 +60,7 @@ public AnnotationVisitor visitTypeAnnotation(int typeRef,
   @Override
   public MethodVisitor visitMethod(int access, String name, String desc,
           String signature, String[] exceptions) {
-      return new MethodVisitor(Opcodes.ASM5) {
+      return new MethodVisitor(Opcodes.ASM9) {
 
           @Override
           public AnnotationVisitor visitAnnotationDefault() {