diff --git a/build.gradle.kts b/build.gradle.kts
index 3c654f09..3a4d6414 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -194,8 +194,13 @@ dependencies {
         }
     }
 
-    if (mcVersion >= 11600) {
-        modCompileOnly("maven.modrinth:iris:1.18.x-v1.2.0")
+    val irisVersion = when {
+        mcVersion >= 12000 -> "1.7.2+1.20.1"
+        mcVersion >= 11600 -> "1.18.x-v1.2.0"
+        else -> null
+    }
+    if (irisVersion != null) {
+        modCompileOnly("maven.modrinth:iris:$irisVersion")
     }
 
     testImplementation("junit:junit:4.11")
diff --git a/root.gradle.kts b/root.gradle.kts
index 37fe3c51..e554ebc7 100755
--- a/root.gradle.kts
+++ b/root.gradle.kts
@@ -234,7 +234,7 @@ preprocess {
     mc12006.link(mc12004)
     mc12004.link(mc12002, file("versions/mapping-fabric-1.20.4-1.20.2.txt"))
     mc12002.link(mc12001)
-    mc12001.link(mc11904)
+    mc12001.link(mc11904, file("versions/mapping-fabric-1.20.1-1.19.4.txt"))
     mc11904.link(mc11903)
     mc11903.link(mc11902, file("versions/mapping-fabric-1.19.3-1.19.2.txt"))
     mc11902.link(mc11901)
diff --git a/versions/mapping-fabric-1.20.1-1.19.4.txt b/versions/mapping-fabric-1.20.1-1.19.4.txt
new file mode 100644
index 00000000..47490df5
--- /dev/null
+++ b/versions/mapping-fabric-1.20.1-1.19.4.txt
@@ -0,0 +1,5 @@
+net.irisshaders.iris.Iris net.coderbot.iris.Iris
+net.irisshaders.iris.config.IrisConfig net.coderbot.iris.config.IrisConfig
+net.irisshaders.iris.gl.uniform.UniformHolder net.coderbot.iris.gl.uniform.UniformHolder
+net.irisshaders.iris.gl.uniform.UniformUpdateFrequency net.coderbot.iris.gl.uniform.UniformUpdateFrequency
+net.irisshaders.iris.uniforms.CommonUniforms net.coderbot.iris.uniforms.CommonUniforms