diff --git a/.github/workflows/changelog.yaml b/.github/workflows/changelog.yaml
index 9d1c28fc..c8ac0581 100644
--- a/.github/workflows/changelog.yaml
+++ b/.github/workflows/changelog.yaml
@@ -97,7 +97,7 @@ jobs:
             exit 1
           fi
 
-          sed -i "1,$(expr $tagline - 1)d" "$FILENAME"
+          sed -i "1,$(( tagline - 1 ))d" "$FILENAME"
           # delete generated line (or it will be added multiple times)
           sed -i '/This Changelog was automatically generated by/d' "$FILENAME"
           # delete trailing empty lines