diff --git a/src/main/kotlin/dev/deftu/gradle/tools/minecraft/loom.gradle.kts b/src/main/kotlin/dev/deftu/gradle/tools/minecraft/loom.gradle.kts
index 420d4eb..7b3b1c9 100644
--- a/src/main/kotlin/dev/deftu/gradle/tools/minecraft/loom.gradle.kts
+++ b/src/main/kotlin/dev/deftu/gradle/tools/minecraft/loom.gradle.kts
@@ -43,8 +43,9 @@ dependencies {
     if (propertyBoolOr("loom.mappings.use", true)) {
         propertyOr(
             "loom.mappings", when {
-                mcData.isForge && mcData.version <= MinecraftVersion.VERSION_1_15_2  -> mcData.dependencies.forge.mcpDependency
                 mcData.isFabric -> "net.fabricmc:yarn:${mcData.dependencies.fabric.yarnVersion}"
+                mcData.isLegacyFabric -> "net.legacyfabric:yarn:${mcData.dependencies.legacyFabric.legacyYarnVersion}"
+                mcData.isForge && mcData.version <= MinecraftVersion.VERSION_1_15_2  -> mcData.dependencies.forge.mcpDependency
                 else -> "official"
             }
         ).apply {
diff --git a/src/main/kotlin/dev/deftu/gradle/utils/MCData.kt b/src/main/kotlin/dev/deftu/gradle/utils/MCData.kt
index 7d18b3c..d312b73 100644
--- a/src/main/kotlin/dev/deftu/gradle/utils/MCData.kt
+++ b/src/main/kotlin/dev/deftu/gradle/utils/MCData.kt
@@ -55,6 +55,17 @@ class MCDependencies(
 
     }
 
+    inner class LegacyFabric {
+
+        val legacyYarnVersion: String
+            get() {
+                if (!mcData.isLegacyFabric) throw LoaderSpecificException(ModLoader.FABRIC)
+
+                return MinecraftInfo.LegacyFabric.getLegacyYarnVersion(mcData.version)
+            }
+
+    }
+
     inner class ForgeLike {
 
         val kotlinForForgeVersion: String
@@ -96,6 +107,7 @@ class MCDependencies(
     }
 
     val fabric = Fabric()
+    val legacyFabric = LegacyFabric()
     val forgeLike = ForgeLike()
     val forge = Forge()
     val neoForged = NeoForged()
@@ -111,6 +123,9 @@ data class MCData(
     val isFabric: Boolean
         get() = loader == ModLoader.FABRIC
 
+    val isLegacyFabric: Boolean
+        get() = loader == ModLoader.FABRIC && version < MinecraftVersion.VERSION_1_13_2
+
     val isForge: Boolean
         get() = loader == ModLoader.FORGE
 
diff --git a/src/main/kotlin/dev/deftu/gradle/utils/MinecraftInfo.kt b/src/main/kotlin/dev/deftu/gradle/utils/MinecraftInfo.kt
index 1820256..9889deb 100644
--- a/src/main/kotlin/dev/deftu/gradle/utils/MinecraftInfo.kt
+++ b/src/main/kotlin/dev/deftu/gradle/utils/MinecraftInfo.kt
@@ -129,6 +129,24 @@ object MinecraftInfo {
 
     }
 
+    object LegacyFabric {
+
+        private val legacyYarnVersions = MinecraftVersionMap(
+            MinecraftVersion.VERSION_1_13_2 to "1.13.2+build.541:v2",
+            MinecraftVersion.VERSION_1_12_2 to "1.12.2+build.541:v2",
+            MinecraftVersion.VERSION_1_11_2 to "1.11.2+build.541:v2",
+            MinecraftVersion.VERSION_1_10_2 to "1.10.2+build.541:v2",
+            MinecraftVersion.VERSION_1_9_4 to "1.9.4+build.541:v2",
+            MinecraftVersion.VERSION_1_8_9 to "1.8.9+build.541:v2"
+        )
+
+        @JvmStatic
+        fun getLegacyYarnVersion(version: MinecraftVersion): String {
+            return legacyYarnVersions[version] ?: throw IllegalArgumentException("Unknown version for (legacy) Yarn mappings: $version")
+        }
+
+    }
+
     object ForgeLike {
 
         @JvmStatic