diff --git a/build.gradle b/build.gradle
index 430d2fc..38cfe33 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-	id 'com.github.johnrengelman.shadow' version '2.0.1'
+	id 'com.github.johnrengelman.shadow' version '2.0.2'
 	id 'com.palantir.git-version' version '0.10.0'
 	id 'java'
 }
@@ -10,7 +10,7 @@ repositories {
 }
 
 dependencies {
-	compile 'org.ow2.asm:asm:5.2'
+	compile 'org.ow2.asm:asm:6.0'
 	compile 'org.yaml:snakeyaml:1.19'
 	compileOnly ('net.minecraft:launchwrapper:1.12') {
 		transitive = false
diff --git a/src/main/java/org/to2mbn/authlibinjector/transform/LdcTransformUnit.java b/src/main/java/org/to2mbn/authlibinjector/transform/LdcTransformUnit.java
index f46e21d..83bca53 100644
--- a/src/main/java/org/to2mbn/authlibinjector/transform/LdcTransformUnit.java
+++ b/src/main/java/org/to2mbn/authlibinjector/transform/LdcTransformUnit.java
@@ -1,6 +1,6 @@
 package org.to2mbn.authlibinjector.transform;
 
-import static org.objectweb.asm.Opcodes.ASM5;
+import static org.objectweb.asm.Opcodes.ASM6;
 import static org.to2mbn.authlibinjector.AuthlibInjector.log;
 import java.util.Optional;
 import java.util.function.Function;
@@ -17,11 +17,11 @@ public class LdcTransformUnit implements TransformUnit {
 
 	@Override
 	public Optional<ClassVisitor> transform(String className, ClassVisitor writer, Runnable modifiedCallback) {
-		return Optional.of(new ClassVisitor(ASM5, writer) {
+		return Optional.of(new ClassVisitor(ASM6, writer) {
 
 			@Override
 			public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
-				return new MethodVisitor(ASM5, super.visitMethod(access, name, desc, signature, exceptions)) {
+				return new MethodVisitor(ASM6, super.visitMethod(access, name, desc, signature, exceptions)) {
 
 					@Override
 					public void visitLdcInsn(Object cst) {
diff --git a/src/main/java/org/to2mbn/authlibinjector/transform/SkinWhitelistTransformUnit.java b/src/main/java/org/to2mbn/authlibinjector/transform/SkinWhitelistTransformUnit.java
index 8eb6089..99de075 100644
--- a/src/main/java/org/to2mbn/authlibinjector/transform/SkinWhitelistTransformUnit.java
+++ b/src/main/java/org/to2mbn/authlibinjector/transform/SkinWhitelistTransformUnit.java
@@ -2,7 +2,7 @@ package org.to2mbn.authlibinjector.transform;
 
 import static org.objectweb.asm.Opcodes.AASTORE;
 import static org.objectweb.asm.Opcodes.ANEWARRAY;
-import static org.objectweb.asm.Opcodes.ASM5;
+import static org.objectweb.asm.Opcodes.ASM6;
 import static org.objectweb.asm.Opcodes.DUP;
 import static org.objectweb.asm.Opcodes.ICONST_0;
 import static org.objectweb.asm.Opcodes.ICONST_1;
@@ -23,12 +23,12 @@ public class SkinWhitelistTransformUnit implements TransformUnit {
 	@Override
 	public Optional<ClassVisitor> transform(String className, ClassVisitor writer, Runnable modifiedCallback) {
 		if ("com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService".equals(className)) {
-			return Optional.of(new ClassVisitor(ASM5, writer) {
+			return Optional.of(new ClassVisitor(ASM6, writer) {
 
 				@Override
 				public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
 					if ("<clinit>".equals(name)) {
-						return new MethodVisitor(ASM5, super.visitMethod(access, name, desc, signature, exceptions)) {
+						return new MethodVisitor(ASM6, super.visitMethod(access, name, desc, signature, exceptions)) {
 
 							int status = 0;
 
diff --git a/src/main/java/org/to2mbn/authlibinjector/transform/YggdrasilKeyTransformUnit.java b/src/main/java/org/to2mbn/authlibinjector/transform/YggdrasilKeyTransformUnit.java
index 13d9c3e..cab0710 100644
--- a/src/main/java/org/to2mbn/authlibinjector/transform/YggdrasilKeyTransformUnit.java
+++ b/src/main/java/org/to2mbn/authlibinjector/transform/YggdrasilKeyTransformUnit.java
@@ -1,6 +1,6 @@
 package org.to2mbn.authlibinjector.transform;
 
-import static org.objectweb.asm.Opcodes.ASM5;
+import static org.objectweb.asm.Opcodes.ASM6;
 import static org.objectweb.asm.Opcodes.BASTORE;
 import static org.objectweb.asm.Opcodes.BIPUSH;
 import static org.objectweb.asm.Opcodes.DUP;
@@ -25,12 +25,12 @@ public class YggdrasilKeyTransformUnit implements TransformUnit {
 	@Override
 	public Optional<ClassVisitor> transform(String className, ClassVisitor writer, Runnable modifiedCallback) {
 		if ("com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService".equals(className)) {
-			return Optional.of(new ClassVisitor(ASM5, writer) {
+			return Optional.of(new ClassVisitor(ASM6, writer) {
 
 				@Override
 				public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
 					if ("<init>".equals(name)) {
-						return new MethodVisitor(ASM5, super.visitMethod(access, name, desc, signature, exceptions)) {
+						return new MethodVisitor(ASM6, super.visitMethod(access, name, desc, signature, exceptions)) {
 
 							int state = 0;