diff --git a/agent/src/main/java/org/jboss/byteman/agent/adapter/BMJSRInliner.java b/agent/src/main/java/org/jboss/byteman/agent/adapter/BMJSRInliner.java
index fd24681a..ce7f6a70 100644
--- a/agent/src/main/java/org/jboss/byteman/agent/adapter/BMJSRInliner.java
+++ b/agent/src/main/java/org/jboss/byteman/agent/adapter/BMJSRInliner.java
@@ -35,7 +35,7 @@ public class BMJSRInliner extends ClassVisitor
 {
     public BMJSRInliner(ClassVisitor cv)
     {
-        super(Opcodes.ASM7, cv);
+        super(Opcodes.ASM9, cv);
     }
 
     @Override
diff --git a/agent/src/main/java/org/jboss/byteman/agent/adapter/BMLocalScopeAdapter.java b/agent/src/main/java/org/jboss/byteman/agent/adapter/BMLocalScopeAdapter.java
index 60d15d0f..e0ff22ab 100644
--- a/agent/src/main/java/org/jboss/byteman/agent/adapter/BMLocalScopeAdapter.java
+++ b/agent/src/main/java/org/jboss/byteman/agent/adapter/BMLocalScopeAdapter.java
@@ -34,7 +34,7 @@ public class BMLocalScopeAdapter extends ClassVisitor
 {
     public BMLocalScopeAdapter(ClassVisitor cv)
     {
-        super(OpcodesHelper.ASM7, cv);
+        super(OpcodesHelper.ASM9, cv);
     }
 
     @Override
diff --git a/agent/src/main/java/org/jboss/byteman/agent/adapter/RuleAdapter.java b/agent/src/main/java/org/jboss/byteman/agent/adapter/RuleAdapter.java
index 8ffc7186..c37755ed 100644
--- a/agent/src/main/java/org/jboss/byteman/agent/adapter/RuleAdapter.java
+++ b/agent/src/main/java/org/jboss/byteman/agent/adapter/RuleAdapter.java
@@ -34,7 +34,7 @@ public class RuleAdapter extends ClassVisitor
 {
     protected RuleAdapter(ClassVisitor cv, TransformContext transformContext)
     {
-        super(Opcodes.ASM7, cv);
+        super(Opcodes.ASM9, cv);
         this.transformContext =  transformContext;
     }
 
diff --git a/agent/src/main/java/org/jboss/byteman/agent/check/ClassStructureAdapter.java b/agent/src/main/java/org/jboss/byteman/agent/check/ClassStructureAdapter.java
index 53fecb7c..2477990d 100644
--- a/agent/src/main/java/org/jboss/byteman/agent/check/ClassStructureAdapter.java
+++ b/agent/src/main/java/org/jboss/byteman/agent/check/ClassStructureAdapter.java
@@ -38,7 +38,7 @@ public class ClassStructureAdapter extends ClassVisitor {
     private String superName = null;
     private String outerClass = null;
 
-    public ClassStructureAdapter() { super(Opcodes.ASM7); }
+    public ClassStructureAdapter() { super(Opcodes.ASM9); }
 
     public boolean isInterface() {
         return isInterface;
diff --git a/pom.xml b/pom.xml
index b4ef319e..2ea7ce9b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -106,7 +106,7 @@
         <!-- for testing: command line args to enable debugger and verbose trace -->
         <debug.args>-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005 -Dorg.jboss.byteman.verbose</debug.args>
         <!-- asm release version to use -->
-        <asm.version>7.3.1</asm.version>
+        <asm.version>9.0-beta</asm.version>
     </properties>
 
     <dependencyManagement>