diff --git a/action.yml b/action.yml
index cf2eb95..fc1a952 100644
--- a/action.yml
+++ b/action.yml
@@ -16,10 +16,10 @@ inputs:
     required: true
   access-key-id:
     description: 'aws access key id'
-    required: true
+    required: false
   secret-access-key:
     description: 'aws secret access key'
-    required: true
+    required: false
   bucket:
     description: 'aws s3 bucket'
     required: true
diff --git a/dist/restore/index.js b/dist/restore/index.js
index fd7f903..cf4497c 100644
--- a/dist/restore/index.js
+++ b/dist/restore/index.js
@@ -43288,13 +43288,20 @@ const path = __importStar(__webpack_require__(5622));
 const actionUtils_1 = __webpack_require__(443);
 class CacheService {
     constructor(accessKeyId, secretAccessKey, region, bucket) {
-        this._client = new aws_sdk_1.S3({
-            region: region,
-            credentials: {
-                accessKeyId: accessKeyId,
-                secretAccessKey: secretAccessKey
-            }
-        });
+        if (accessKeyId && secretAccessKey) {
+            this._client = new aws_sdk_1.S3({
+                region: region,
+                credentials: {
+                    accessKeyId: accessKeyId,
+                    secretAccessKey: secretAccessKey
+                }
+            });
+        }
+        else {
+            this._client = new aws_sdk_1.S3({
+                region: region
+            });
+        }
         this._bucket = bucket;
     }
     restoreCache(paths, primaryKey, restoreKeys) {
diff --git a/dist/save/index.js b/dist/save/index.js
index dc4feba..ca36b55 100644
--- a/dist/save/index.js
+++ b/dist/save/index.js
@@ -43288,13 +43288,20 @@ const path = __importStar(__webpack_require__(5622));
 const actionUtils_1 = __webpack_require__(443);
 class CacheService {
     constructor(accessKeyId, secretAccessKey, region, bucket) {
-        this._client = new aws_sdk_1.S3({
-            region: region,
-            credentials: {
-                accessKeyId: accessKeyId,
-                secretAccessKey: secretAccessKey
-            }
-        });
+        if (accessKeyId && secretAccessKey) {
+            this._client = new aws_sdk_1.S3({
+                region: region,
+                credentials: {
+                    accessKeyId: accessKeyId,
+                    secretAccessKey: secretAccessKey
+                }
+            });
+        }
+        else {
+            this._client = new aws_sdk_1.S3({
+                region: region
+            });
+        }
         this._bucket = bucket;
     }
     restoreCache(paths, primaryKey, restoreKeys) {
diff --git a/package.json b/package.json
index a4994c3..f5dd60c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cache",
-  "version": "0.11.0",
+  "version": "0.12.0",
   "private": true,
   "description": "Cache dependencies and build outputs",
   "main": "dist/restore/index.js",
diff --git a/src/cache.service.ts b/src/cache.service.ts
index e2ccfe3..41b0580 100644
--- a/src/cache.service.ts
+++ b/src/cache.service.ts
@@ -24,13 +24,19 @@ export class CacheService {
         region: string,
         bucket: string
     ) {
-        this._client = new S3({
-            region: region,
-            credentials: {
-                accessKeyId: accessKeyId,
-                secretAccessKey: secretAccessKey
-            }
-        });
+        if (accessKeyId && secretAccessKey) {
+            this._client = new S3({
+                region: region,
+                credentials: {
+                    accessKeyId: accessKeyId,
+                    secretAccessKey: secretAccessKey
+                }
+            });
+        } else {
+            this._client = new S3({
+                region: region
+            });
+        }
         this._bucket = bucket;
     }