diff --git a/src/create-fixed-array/index.ts b/src/create-fixed-array/index.ts
index c0ebede9..3fd74935 100644
--- a/src/create-fixed-array/index.ts
+++ b/src/create-fixed-array/index.ts
@@ -1,6 +1,6 @@
-const arrayMap: Record<number, readonly unknown[]> = {};
+const arrayMap: Record<number, readonly number[]> = {};
 
-export const createFixedArray = (length: number): readonly unknown[] => {
+export const createFixedArray = (length: number): readonly number[] => {
   arrayMap[length] ||= arrayMap[length] || Array.from(Array(length).keys());
   return arrayMap[length];
 };