diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1ed7ee4..0845d73 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ variables:
 
   # ANDROID_BUILD_TOOLS is the version of the Android build tools you are using.
   # It should match buildToolsVersion.
-  ANDROID_BUILD_TOOLS: "31.0.0"
+  ANDROID_BUILD_TOOLS: "30.0.2"
 
   # It's what version of the command line tools we're going to download from the official site.
   # Official Site-> https://developer.android.com/studio/index.html