diff --git a/src/main/java/net/fabricmc/loom/util/Constants.java b/src/main/java/net/fabricmc/loom/util/Constants.java
index 8189e91..7ca9659 100644
--- a/src/main/java/net/fabricmc/loom/util/Constants.java
+++ b/src/main/java/net/fabricmc/loom/util/Constants.java
@@ -102,7 +102,7 @@ public class Constants {
 		 * Constants for versions of dependencies.
 		 */
 		public static final class Versions {
-			public static final String MIXIN_COMPILE_EXTENSIONS = "0.4.1";
+			public static final String MIXIN_COMPILE_EXTENSIONS = "0.4.2";
 			public static final String DEV_LAUNCH_INJECTOR = "0.2.1+build.8";
 			public static final String TERMINAL_CONSOLE_APPENDER = "1.2.0";
 			public static final String JETBRAINS_ANNOTATIONS = "19.0.0";