diff --git a/.github/workflows/ci-develop.yml b/.github/workflows/ci-develop.yml
index 6954884..042fb8a 100644
--- a/.github/workflows/ci-develop.yml
+++ b/.github/workflows/ci-develop.yml
@@ -114,4 +114,4 @@ jobs:
         env:
           WEBHOOK_URL: ${{ secrets.WEBHOOK_URL }}
         run: |
-          curl -X HEAD -d "" $WEBHOOK_URL
+          curl -X HEAD -d "" "$WEBHOOK_URL"
diff --git a/.github/workflows/ci-master.yml b/.github/workflows/ci-master.yml
index 090d8bb..7a7591e 100644
--- a/.github/workflows/ci-master.yml
+++ b/.github/workflows/ci-master.yml
@@ -117,4 +117,4 @@ jobs:
         env:
           WEBHOOK_URL: ${{ secrets.WEBHOOK_URL }}
         run: |
-          curl -X HEAD -d "" $WEBHOOK_URL
+          curl -X HEAD -d "" "$WEBHOOK_URL"