diff --git a/.github/workflows/pr-format-check.yml b/.github/workflows/pr-format-check.yml
index 5d448de09..26203ab3b 100644
--- a/.github/workflows/pr-format-check.yml
+++ b/.github/workflows/pr-format-check.yml
@@ -1,5 +1,3 @@
-name: Clang Format Check
-
 on:
   pull_request:
     branches:
@@ -13,14 +11,23 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
         
       - name: Set up clang-format
         run: sudo apt-get install clang-format
         
+      - name: Fetch main branch
+        run: git fetch origin main:main
+        
+      - name: Get commit ID of main branch
+        run: |
+          MAIN_COMMIT=$(git rev-parse origin/main)
+          echo "Commit ID of main branch: $MAIN_COMMIT"
+          
       - name: Check code formatting
         run: |
-          git clang-format --style=firmware/.clang-format --diff HEAD -- '*.cpp' '*.h'
-
+          git clang-format --style=firmware/.clang-format --diff $MAIN_COMMIT..HEAD '*.cpp' '*.h'
           
       - name: Check for changes
         id: check_changes