diff --git a/.github/workflows/sanity_check.yml b/.github/workflows/sanity_check.yml
index e6a5f1591..f16b79d4d 100644
--- a/.github/workflows/sanity_check.yml
+++ b/.github/workflows/sanity_check.yml
@@ -32,7 +32,7 @@ jobs:
     - name: Download clang-format-diff.py
       uses: wei/wget@v1
       with:
-        args: https://raw.githubusercontent.com/llvm/llvm-project/main/clang/tools/clang-format/clang-format-diff.py
+        args: https://raw.githubusercontent.com/llvm/llvm-project/release/12.x/clang/tools/clang-format/clang-format-diff.py
 
     - name: Check format
       run: VERBOSE_CHECK=1 make check-format