diff --git a/README.md b/README.md
index 3534384a..74be0b3f 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Then copy the contents of the `.txt` file to your GH secrets
 
 ## ENV: `BUILD_TOOLS_VERSION`
 
-**Optional:** You can manually specify a version of build-tools to use. We use `33.0.0` by default.
+**Optional:** You can manually specify a version of build-tools to use. We use `35.0.0` by default.
 
 ## Outputs
 
@@ -77,8 +77,8 @@ steps:
       keyPassword: ${{ secrets.KEY_PASSWORD }}
       zipAlign: true
     env:
-      # override default build-tools version (33.0.0) -- optional
-      BUILD_TOOLS_VERSION: "34.0.0"
+      # override default build-tools version (35.0.0) -- optional
+      BUILD_TOOLS_VERSION: "35.0.0"
 
   # Example use of `signedReleaseFile` output -- not needed
   - uses: actions/upload-artifact@v4
diff --git a/lib/index.js b/lib/index.js
index 6d1c7b16..02d74800 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -26180,7 +26180,7 @@ __webpack_async_result__();
 async function signApkFile(apkFile, signingKeyFile, alias, keyStorePassword, keyPassword, doZipAlign, usePageAlign) {
     _actions_core__WEBPACK_IMPORTED_MODULE_1__.debug('Zipaligning APK file');
     // Find zipalign executable
-    const buildToolsVersion = process.env.BUILD_TOOLS_VERSION || '33.0.0';
+    const buildToolsVersion = process.env.BUILD_TOOLS_VERSION || '35.0.0';
     const androidHome = process.env.ANDROID_HOME;
     const buildTools = path__WEBPACK_IMPORTED_MODULE_3__.join(androidHome, `build-tools/${buildToolsVersion}`);
     if (!fs__WEBPACK_IMPORTED_MODULE_4__.existsSync(buildTools)) {