diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7b729196..a830a234 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -84,7 +84,7 @@ jobs:
 
       - name: Prepare version file
         run: |
-          scripts/generate-build-info.sh ${{ github.ref }}
+          scripts/generate-build-info.sh ${{ github.sha }}
           cat app/build_info.py
 
       - name: Test with pytest
@@ -123,7 +123,7 @@ jobs:
 
       - name: Prepare version file
         run: |
-          scripts/generate-build-info.sh ${{ github.ref }}
+          scripts/generate-build-info.sh ${{ github.sha }}
           cat app/build_info.py
 
       - name: Build image and publish to Docker Registry