diff --git a/.github/workflows/upload-to-nuget.yml b/.github/workflows/upload-to-nuget.yml
index bf12c52..13398b7 100644
--- a/.github/workflows/upload-to-nuget.yml
+++ b/.github/workflows/upload-to-nuget.yml
@@ -25,7 +25,7 @@ jobs:
       working-directory: ./Promete
 
     - name: Generate nuget package.
-      run: dotnet pack --configuration Release -o nupkg --version-suffix build-${{ github.sha:6 }}
+      run: dotnet pack --configuration Release -o nupkg --version-suffix build-${GITHUB_SHA::6}
       working-directory: ./Promete
 
     - name: Publish to nuget