diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 8d35918..2128bcd 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -40,7 +40,7 @@ jobs:
       - uses: ./.github/actions/install-packages
       - name: get version from `pyproject.toml`
         run: |
-          package_version=`grep -m 1 version pyproject.toml | grep -e '\d.\d.\d' -o`
+          package_version=$(grep -m 1 version pyproject.toml | grep -e '\d.\d.\d' -o)
           echo "GIT_TAG_VERSION=$package_version" >> $GITHUB_ENV
       - uses: rickstaa/action-create-tag@v1
         id: create-tag