diff --git a/Forge/build.gradle b/Forge/build.gradle
index 721d99d..8a01fca 100644
--- a/Forge/build.gradle
+++ b/Forge/build.gradle
@@ -49,8 +49,17 @@ dependencies {
 
 mixin {
     add sourceSets.main, "${mod_id}.refmap.json"
-    config "${mod_id}.mixins.json"
-    config "${mod_id}_forge.mixins.json"
+}
+
+// As of 1.20.6 Forge no longer has reobf tasks. This has broken mixins adding configs correctly into the manifest file
+// See: https://github.com/SpongePowered/MixinGradle/blob/f800b26d2b180d98d9aa9355e5b3086d71218508/src/main/groovy/org/spongepowered/asm/gradle/plugins/MixinExtension.groovy#L184
+// Instead, we will do it ourselves.
+jar {
+    manifest {
+        attributes([
+            'MixinConfigs': "${mod_id}.mixins.json" + "," + "${mod_id}_forge.mixins.json",
+        ])
+    }
 }
 
 tasks.withType(JavaCompile) {