diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
index 07b05f2..7d86518 100644
--- a/.github/workflows/pr-check.yml
+++ b/.github/workflows/pr-check.yml
@@ -134,7 +134,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y g++ ccache
 
       - name: Cache ccache
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: ~/.ccache
           key: ccache-${{ matrix.os }}-${{ hashFiles('**/*.cpp', '**/*.h') }}