diff --git a/.github/workflows/storybook.yml b/.github/workflows/storybook.yml
index c52883ffd..daa76509c 100644
--- a/.github/workflows/storybook.yml
+++ b/.github/workflows/storybook.yml
@@ -88,7 +88,7 @@ jobs:
         if [ "$BRANCH" = "misskey-dev:$HEAD_REF" ]; then
           BRANCH="$HEAD_REF"
         fi
-        pnpm --filter frontend chromatic --exit-once-uploaded -d storybook-static --branch-name $BRANCH $(echo "$CHROMATIC_PARAMETER")
+        pnpm --filter frontend chromatic --exit-once-uploaded -d storybook-static --branch-name "$BRANCH" $(echo "$CHROMATIC_PARAMETER")
       env:
         HEAD_REF: ${{ github.event.pull_request.head.ref }}
         CHROMATIC_PROJECT_TOKEN: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}