diff --git a/.lefthook.yml b/.lefthook.yml
index 97083fd..7d657c4 100644
--- a/.lefthook.yml
+++ b/.lefthook.yml
@@ -8,7 +8,7 @@ pre-commit:
     - name: sort cdns
       run: |
         for f in {all_files}; do
-          sort -u -o ${f} ${f}
+          sort -uo ${f} ${f}
         done
       env:
         LC_ALL: C