diff --git a/src/axios/cache.ts b/src/axios/cache.ts
index fe3050b..09b8745 100644
--- a/src/axios/cache.ts
+++ b/src/axios/cache.ts
@@ -3,15 +3,16 @@ import { applyRequestInterceptor } from '../interceptors/request';
 import { applyResponseInterceptor } from '../interceptors/response';
 import { MemoryStorage } from '../storage/memory';
 import { defaultKeyGenerator } from '../utils/key-generator';
-import { AxiosCacheInstance, CacheInstance, CacheRequestConfig } from './types';
+import { AxiosCacheInstance, CacheInstance, CacheProperties } from './types';
 
-type Options = CacheRequestConfig['cache'] & Partial<CacheInstance>;
-
-export function createCache(axios: AxiosInstance, options: Options = {}): AxiosCacheInstance {
+export function createCache(
+  axios: AxiosInstance,
+  options: Partial<CacheInstance & CacheProperties> = {}
+): AxiosCacheInstance {
   const axiosCache = axios as AxiosCacheInstance;
 
   axiosCache.storage = options.storage || new MemoryStorage();
-  axiosCache.generateKey = defaultKeyGenerator;
+  axiosCache.generateKey = options.generateKey || defaultKeyGenerator;
 
   // CacheRequestConfig values
   axiosCache.defaults = {
diff --git a/src/axios/index.ts b/src/axios/index.ts
new file mode 100644
index 0000000..4f40e74
--- /dev/null
+++ b/src/axios/index.ts
@@ -0,0 +1,2 @@
+export * from './cache';
+export * from './types'
\ No newline at end of file
diff --git a/src/axios/types.ts b/src/axios/types.ts
index 591fa83..ed23086 100644
--- a/src/axios/types.ts
+++ b/src/axios/types.ts
@@ -8,6 +8,57 @@ import type {
 } from 'axios';
 import { CacheStorage } from '../storage/types';
 
+export type DefaultCacheRequestConfig = AxiosRequestConfig & {
+  cache: Required<CacheProperties>;
+};
+
+export type CacheProperties = {
+  /**
+   * The time until the cached value is expired in milliseconds.
+   *
+   * @default 1000 * 60 * 5
+   */
+  maxAge?: number;
+
+  /**
+   * If this interceptor should configure the cache from the request cache header
+   * When used, the maxAge property is ignored
+   *
+   * @default false
+   */
+  interpretHeader?: boolean;
+
+  /**
+   * All methods that should be cached.
+   *
+   * @default ['get']
+   */
+  methods?: Lowercase<Method>[];
+
+  /**
+   * The function to check if the response code permit being cached.
+   *
+   * @default ({ status }) => status >= 200 && status < 300
+   */
+  shouldCache?: (response: AxiosResponse) => boolean;
+
+  /**
+   * Once the request is resolved, this specifies what requests should we change the cache.
+   * Can be used to update the request or delete other caches.
+   *
+   * If the function returns void, the entry is deleted
+   *
+   * This is independent if the request made was cached or not.
+   *
+   * The id used is the same as the id on `CacheRequestConfig['id']`, auto-generated or not.
+   *
+   * @default {}
+   */
+  update?: {
+    [id: string]: 'delete' | ((oldValue: any, atual: any) => any | void);
+  };
+};
+
 /**
  * Options that can be overridden per request
  */
@@ -23,52 +74,7 @@ export type CacheRequestConfig = AxiosRequestConfig & {
   /**
    * All cache options for the request
    */
-  cache?: {
-    /**
-     * The time until the cached value is expired in milliseconds.
-     *
-     * @default 1000 * 60 * 5
-     */
-    maxAge?: number;
-
-    /**
-     * If this interceptor should configure the cache from the request cache header
-     * When used, the maxAge property is ignored
-     *
-     * @default false
-     */
-    interpretHeader?: boolean;
-
-    /**
-     * All methods that should be cached.
-     *
-     * @default ['get']
-     */
-    methods?: Lowercase<Method>[];
-
-    /**
-     * The function to check if the response code permit being cached.
-     *
-     * @default ({ status }) => status >= 200 && status < 300
-     */
-    shouldCache?: (response: AxiosResponse) => boolean;
-
-    /**
-     * Once the request is resolved, this specifies what requests should we change the cache.
-     * Can be used to update the request or delete other caches.
-     *
-     * If the function returns void, the entry is deleted
-     *
-     * This is independent if the request made was cached or not.
-     *
-     * The id used is the same as the id on `CacheRequestConfig['id']`, auto-generated or not.
-     *
-     * @default {}
-     */
-    update?: {
-      [id: string]: 'delete' | ((oldValue: any, atual: any) => any | void);
-    };
-  };
+  cache?: CacheProperties;
 };
 
 export interface CacheInstance {
@@ -87,11 +93,19 @@ export interface CacheInstance {
   generateKey: (options: CacheRequestConfig) => string;
 }
 
+/**
+ * Same as the AxiosInstance but with CacheRequestConfig as a config type.
+ *
+ * @see AxiosInstance
+ * @see CacheRequestConfig
+ * @see CacheInstance
+ */
 export interface AxiosCacheInstance extends AxiosInstance, CacheInstance {
   (config: CacheRequestConfig): AxiosPromise;
   (url: string, config?: CacheRequestConfig): AxiosPromise;
 
-  defaults: CacheRequestConfig;
+  defaults: DefaultCacheRequestConfig;
+
   interceptors: {
     request: AxiosInterceptorManager<CacheRequestConfig>;
     response: AxiosInterceptorManager<AxiosResponse & { config: CacheRequestConfig }>;
diff --git a/src/index.ts b/src/index.ts
index bf457ad..673a4ce 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,3 @@
-export { createCache } from './axios/cache';
-export * from './constants';
+export * from './axios';
+export * as Constants from './constants';
 export * from './storage';
diff --git a/src/interceptors/request.ts b/src/interceptors/request.ts
index 3c4c482..b85d9a6 100644
--- a/src/interceptors/request.ts
+++ b/src/interceptors/request.ts
@@ -20,7 +20,7 @@ export function applyRequestInterceptor(axios: AxiosCacheInstance) {
         // The cache header will be set after the response has been read, until that time, the expiration will be -1
         expiration: config.cache?.interpretHeader
           ? -1
-          : config.cache?.maxAge || axios.defaults.cache!.maxAge!
+          : config.cache?.maxAge || axios.defaults.cache.maxAge
       });
       return config;
     }
diff --git a/src/interceptors/response.ts b/src/interceptors/response.ts
index 7522f22..4a16f49 100644
--- a/src/interceptors/response.ts
+++ b/src/interceptors/response.ts
@@ -48,13 +48,13 @@ export function applyResponseInterceptor(axios: AxiosCacheInstance) {
       const expirationTime = maxAge
         ? // Header max age in seconds
           Date.now() + maxAge * 1000
-        : response.config.cache?.maxAge || axios.defaults.cache!.maxAge!;
+        : response.config.cache?.maxAge || axios.defaults.cache.maxAge;
 
       cache.expiration = expirationTime;
     } else {
       // If the cache expiration has not been set, use the default expiration.
       cache.expiration =
-        cache.expiration || response.config.cache?.maxAge || axios.defaults.cache!.maxAge!;
+        cache.expiration || response.config.cache?.maxAge || axios.defaults.cache.maxAge!;
     }
 
     const data = { body: response.data, headers: response.headers };
diff --git a/src/storage/memory.ts b/src/storage/memory.ts
index 663a6e2..efc8200 100644
--- a/src/storage/memory.ts
+++ b/src/storage/memory.ts
@@ -10,7 +10,6 @@ export class MemoryStorage implements CacheStorage {
       return value;
     }
 
-    // Fresh copy to prevent code duplication
     const empty = { data: null, expiration: -1, state: 'empty' } as const;
     this.storage.set(key, empty);
     return empty;