diff --git a/tools/deploy.sh b/tools/deploy.sh
index 7a93e73..17a490a 100755
--- a/tools/deploy.sh
+++ b/tools/deploy.sh
@@ -16,7 +16,8 @@ init() {
   fi
 
   # Gemfile could be changed by `bundle install` in actions workflow
-  if [[ -n $(git status Gemfile.lock --porcelain) ]]; then
+  if [[ -n $(git ls-files | grep Gemfile.lock) && -n \
+  $(git status Gemfile.lock --porcelain) ]]; then
     git checkout -- Gemfile.lock
   fi