diff --git a/.github/workflows/nuget-main.yml b/.github/workflows/nuget-main.yml
index 523c4dd..9bbcb68 100644
--- a/.github/workflows/nuget-main.yml
+++ b/.github/workflows/nuget-main.yml
@@ -21,7 +21,7 @@ jobs:
     - name: Bump versions
       uses: SiqiLu/dotnet-bump-version@2.0.0
       with:
-        version_files: "**/${{ PROJECT_NAME }}.csproj"
+        version_files: "**/${{ env.PROJECT_NAME }}.csproj"
         version_mask: 0.0.1.0
         version_overwrite: "*.*.*.*"
         github_token: ${{ secrets.GITHUB_TOKEN }}