diff --git a/.github/workflows/strip-font-data.yml b/.github/workflows/strip-font-data.yml
index 26b4cab0..25c163d4 100644
--- a/.github/workflows/strip-font-data.yml
+++ b/.github/workflows/strip-font-data.yml
@@ -23,9 +23,12 @@ jobs:
               grep -v "^ *_typelessdata: " | \
               perl -ne '$s = undefined if ($s && /^$s[a-z]/); $s = $1 if /^( +)(m_GlyphTable:|m_FreeGlyphRects:|m_CharacterTable:)/; print if not $s;' \
                 "$font" > "$font.tmp"
-            mv "$font" "$font.tmp"
+            mv "$font.tmp" "$font" -fv
           done
           
+      - name: git diff
+        run: git diff
+          
       - name: Check if changes need committing
         run: |
           git config --global user.email "ci@nadena.dev"