diff --git a/.github/workflows/app-prebuild.yml b/.github/workflows/app-prebuild.yml
index f0abaa6..68cde16 100644
--- a/.github/workflows/app-prebuild.yml
+++ b/.github/workflows/app-prebuild.yml
@@ -13,6 +13,9 @@ on:
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
+env:
+  ANDROID_KEY: ${{ secrets.ANDROID_KEY }} # location of your client code
+
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   # This workflow contains a single job called "build"
@@ -37,6 +40,8 @@ jobs:
         with:
           channel: 'stable' # or: 'beta', 'dev' or 'master'
             
+      - name: Set android sign key for app building
+      - run: touch ./android/key.properties && echo $ANDROID_KEY > ./android/key.properties
       - run: flutter pub get
 #       - run: flutter test
       - run: flutter build apk