diff --git a/asm/src/main/java/dev/openrs2/asm/NopClassVisitor.kt b/asm/src/main/java/dev/openrs2/asm/NopClassVisitor.kt
index d5f0a927..bd72f078 100644
--- a/asm/src/main/java/dev/openrs2/asm/NopClassVisitor.kt
+++ b/asm/src/main/java/dev/openrs2/asm/NopClassVisitor.kt
@@ -3,4 +3,4 @@ package dev.openrs2.asm
 import org.objectweb.asm.ClassVisitor
 import org.objectweb.asm.Opcodes
 
-public object NopClassVisitor : ClassVisitor(Opcodes.ASM8)
+public object NopClassVisitor : ClassVisitor(Opcodes.ASM9)
diff --git a/asm/src/main/java/dev/openrs2/asm/classpath/JsrInliner.kt b/asm/src/main/java/dev/openrs2/asm/classpath/JsrInliner.kt
index fcc7668d..00cefa54 100644
--- a/asm/src/main/java/dev/openrs2/asm/classpath/JsrInliner.kt
+++ b/asm/src/main/java/dev/openrs2/asm/classpath/JsrInliner.kt
@@ -5,7 +5,7 @@ import org.objectweb.asm.MethodVisitor
 import org.objectweb.asm.Opcodes
 import org.objectweb.asm.commons.JSRInlinerAdapter
 
-public class JsrInliner(cv: ClassVisitor) : ClassVisitor(Opcodes.ASM8, cv) {
+public class JsrInliner(cv: ClassVisitor) : ClassVisitor(Opcodes.ASM9, cv) {
     override fun visitMethod(
         access: Int,
         name: String,
diff --git a/buildSrc/src/main/java/Versions.kt b/buildSrc/src/main/java/Versions.kt
index 8f520c17..1ba5acae 100644
--- a/buildSrc/src/main/java/Versions.kt
+++ b/buildSrc/src/main/java/Versions.kt
@@ -1,5 +1,5 @@
 object Versions {
-    const val asm = "8.0.1"
+    const val asm = "9.0"
     const val bouncyCastlePkix = "1.66"
     const val bouncyCastleProvider = "1.66"
     const val clikt = "3.0.1"
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt
index b85f5538..d4b0ae6a 100644
--- a/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/ConstSourceInterpreter.kt
@@ -7,7 +7,7 @@ import org.objectweb.asm.tree.AbstractInsnNode
 import org.objectweb.asm.tree.analysis.BasicInterpreter
 import org.objectweb.asm.tree.analysis.Interpreter
 
-public class ConstSourceInterpreter : Interpreter<ConstSourceValue>(Opcodes.ASM8) {
+public class ConstSourceInterpreter : Interpreter<ConstSourceValue>(Opcodes.ASM9) {
     private val basicInterpreter = BasicInterpreter()
 
     override fun newValue(type: Type?): ConstSourceValue? {
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.kt b/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.kt
index fcd5881f..263ee218 100644
--- a/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.kt
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/IntInterpreter.kt
@@ -8,7 +8,7 @@ import org.objectweb.asm.tree.IincInsnNode
 import org.objectweb.asm.tree.analysis.BasicInterpreter
 import org.objectweb.asm.tree.analysis.Interpreter
 
-public class IntInterpreter(private val args: Array<IntValueSet>) : Interpreter<IntValue>(Opcodes.ASM8) {
+public class IntInterpreter(private val args: Array<IntValueSet>) : Interpreter<IntValue>(Opcodes.ASM9) {
     private val basicInterpreter = BasicInterpreter()
 
     override fun newValue(type: Type?): IntValue? {
diff --git a/deob/src/main/java/dev/openrs2/deob/analysis/ThisInterpreter.kt b/deob/src/main/java/dev/openrs2/deob/analysis/ThisInterpreter.kt
index a5a19dfa..4c0ba7dd 100644
--- a/deob/src/main/java/dev/openrs2/deob/analysis/ThisInterpreter.kt
+++ b/deob/src/main/java/dev/openrs2/deob/analysis/ThisInterpreter.kt
@@ -6,7 +6,7 @@ import org.objectweb.asm.tree.AbstractInsnNode
 import org.objectweb.asm.tree.analysis.BasicInterpreter
 import org.objectweb.asm.tree.analysis.Interpreter
 
-public class ThisInterpreter : Interpreter<ThisValue>(Opcodes.ASM8) {
+public class ThisInterpreter : Interpreter<ThisValue>(Opcodes.ASM9) {
     private val basicInterpreter = BasicInterpreter()
 
     override fun newValue(type: Type?): ThisValue? {