diff --git a/.github/workflows/pre-release.yml b/.github/workflows/pre-release.yml
index a2dc89c..1bfd591 100644
--- a/.github/workflows/pre-release.yml
+++ b/.github/workflows/pre-release.yml
@@ -29,6 +29,6 @@ jobs:
       - name: Check doc diff
         shell: bash
         run: |
-          if [[ -n $(git status --porcelain) ]]; then
+          if [ -n $(git status --porcelain) ]; then
             exit 1
           fi