diff --git a/types/index.d.ts b/types/index.d.ts
index 4271a6a..ad7040f 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -104,18 +104,18 @@ type ShouldMergeArrays<T1, T2> = Is<T1, ReadonlyArray<any>> extends true
 	? Is<T2, ReadonlyArray<any>>
 	: false;
 
-type ArrayMerge = <T1, T2>(
-	target: Array<T1>,
-	source: Array<T2>,
+type ArrayMerge = (
+	target: Array<any>,
+	source: Array<any>,
 	options: Required<deepmerge.Options>
 ) => any;
 
-type ObjectMerge = <T1, T2>(
+type ObjectMerge = (
 	key: string,
 	options: Required<deepmerge.Options>
-) => ((target: T1, source: T2, options?: deepmerge.Options) => any) | undefined;
+) => ((target: any, source: any, options?: deepmerge.Options) => any) | undefined;
 
-type IsMergeable = (value: object) => boolean;
+type IsMergeable = (value: any) => boolean;
 
 type DefaultOptions = {
 	arrayMerge: undefined;