diff --git a/.github/workflows/check_pr.yml b/.github/workflows/check_pr.yml
index 9a2145f..3afef15 100644
--- a/.github/workflows/check_pr.yml
+++ b/.github/workflows/check_pr.yml
@@ -29,7 +29,7 @@ jobs:
             TYPE=$(jq -r '.type // "CNAME"' ${jsonfile})
             URL=$(jq -r '.url' ${jsonfile})
             if [ ${TYPE} = "CNAME" ] || [ -z ${TYPE} ]; then
-              if echo ${URL} | grep -E '^https?://[^/]*/[^/]+'; then
+              if echo ${URL} | grep -qE '^https?://[^/]*/.*'; then
                 echo "URL in ${jsonfile} must not contain subdirectories for CNAME records."
                 exit 1
               fi