diff --git a/build.gradle b/build.gradle
index 2e426c70..3346d330 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ if (ENV.BUILD_NUMBER) {
 	build = "release #${ENV.BUILD_NUMBER}"
 	version = baseVersion + '.' + ENV.BUILD_NUMBER
 } else {
-	version = baseVersion + '-forge.40'
+	version = baseVersion + '-forge.42'
 }
 
 configurations {
diff --git a/src/main/java/net/fabricmc/loom/LoomGradleExtension.java b/src/main/java/net/fabricmc/loom/LoomGradleExtension.java
index b09f7440..92764a3f 100644
--- a/src/main/java/net/fabricmc/loom/LoomGradleExtension.java
+++ b/src/main/java/net/fabricmc/loom/LoomGradleExtension.java
@@ -76,6 +76,7 @@ public class LoomGradleExtension {
 	public File accessWidener = null;
 	public Function<String, Object> intermediaryUrl = mcVer -> "https://maven.fabricmc.net/net/fabricmc/intermediary/" + mcVer + "/intermediary-" + mcVer + "-v2.jar";
 	public boolean shareCaches = false;
+	public String mixinConfig = null; // FORGE: Passed to Minecraft
 
 	private final ConfigurableFileCollection unmappedMods;
 
diff --git a/src/main/java/net/fabricmc/loom/providers/LaunchProvider.java b/src/main/java/net/fabricmc/loom/providers/LaunchProvider.java
index 6ee8d180..89efb95b 100644
--- a/src/main/java/net/fabricmc/loom/providers/LaunchProvider.java
+++ b/src/main/java/net/fabricmc/loom/providers/LaunchProvider.java
@@ -82,6 +82,13 @@ public class LaunchProvider extends DependencyProvider {
 
 					.argument("server", "--launchTarget")
 					.argument("server", "fmluserdevserver");
+
+			String mixinConfig = getExtension().mixinConfig;
+
+			if (mixinConfig != null) {
+				launchConfig.argument("-mixin.config");
+				launchConfig.argument(mixinConfig);
+			}
 		}
 
 		//Enable ansi by default for idea and vscode