diff --git a/package.json b/package.json
index a73bccc..4ee6ea6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@zensors/sheriff",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "scripts": {
diff --git a/src/index.ts b/src/index.ts
index d39506e..3f0ae0f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -452,6 +452,8 @@ export namespace M {
 	export function union<T1, T2, T3, T4, T5, T6, T7, T8>(t1: Marshaller<T1>, t2: Marshaller<T2>, t3: Marshaller<T3>, t4: Marshaller<T4>, t5: Marshaller<T5>, t6: Marshaller<T6>, t7: Marshaller<T7>, t8: Marshaller<T8>): Marshaller<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;
 	export function union<T1, T2, T3, T4, T5, T6, T7, T8, T9>(t1: Marshaller<T1>, t2: Marshaller<T2>, t3: Marshaller<T3>, t4: Marshaller<T4>, t5: Marshaller<T5>, t6: Marshaller<T6>, t7: Marshaller<T7>, t8: Marshaller<T8>, t9: Marshaller<T9>): Marshaller<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;
 	export function union<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(t1: Marshaller<T1>, t2: Marshaller<T2>, t3: Marshaller<T3>, t4: Marshaller<T4>, t5: Marshaller<T5>, t6: Marshaller<T6>, t7: Marshaller<T7>, t8: Marshaller<T8>, t9: Marshaller<T9>, t10: Marshaller<T10>): Marshaller<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;
+	export function union<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(t1: Marshaller<T1>, t2: Marshaller<T2>, t3: Marshaller<T3>, t4: Marshaller<T4>, t5: Marshaller<T5>, t6: Marshaller<T6>, t7: Marshaller<T7>, t8: Marshaller<T8>, t9: Marshaller<T9>, t10: Marshaller<T10>, t11: Marshaller<T11>): Marshaller<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10 | T11>;
+	export function union<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(t1: Marshaller<T1>, t2: Marshaller<T2>, t3: Marshaller<T3>, t4: Marshaller<T4>, t5: Marshaller<T5>, t6: Marshaller<T6>, t7: Marshaller<T7>, t8: Marshaller<T8>, t9: Marshaller<T9>, t10: Marshaller<T10>, t11: Marshaller<T11>, t12: Marshaller<T12>): Marshaller<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10 | T11 | T12>;
 	export function union<T>(...types: Marshaller<T>[]): Marshaller<T> {
 		return { kind: "union" as const, types };
 	}