diff --git a/src/cache/cache.ts b/src/cache/cache.ts
index 29b2118..e11991f 100644
--- a/src/cache/cache.ts
+++ b/src/cache/cache.ts
@@ -10,7 +10,7 @@ import type { CacheAxiosResponse, CacheRequestConfig } from './axios';
  * @template R The type returned by this response
  * @template D The type for the request body
  */
-export type CacheProperties<R = any, D = any> = {
+export type CacheProperties<R = unknown, D = unknown> = {
   /**
    * The time until the cached value is expired in milliseconds.
    *
diff --git a/src/util/types.ts b/src/util/types.ts
index f988dc3..5bd92c0 100644
--- a/src/util/types.ts
+++ b/src/util/types.ts
@@ -5,12 +5,12 @@ import type {
   StorageValue
 } from '../storage/types';
 
-export type CachePredicate<R = any, D = any> = Exclude<
+export type CachePredicate<R = unknown, D = unknown> = Exclude<
   CachePredicateObject<R, D> | CachePredicateObject<R, D>['responseMatch'],
   undefined
 >;
 
-export type CachePredicateObject<R = any, D = any> = {
+export type CachePredicateObject<R = unknown, D = unknown> = {
   /** Matches if this function returned true. */
   statusCheck?: (status: number) => boolean;
 
@@ -29,7 +29,7 @@ export type CachePredicateObject<R = any, D = any> = {
 };
 
 /** A simple function that receives a cache request config and should return a string id for it. */
-export type KeyGenerator = <R = any, D = any>(
+export type KeyGenerator = <R = unknown, D = unknown>(
   options: CacheRequestConfig<R, D>
 ) => string;