diff --git a/.github/workflows/run_online.yml b/.github/workflows/run_online.yml
index de1d7d9..b7395dd 100644
--- a/.github/workflows/run_online.yml
+++ b/.github/workflows/run_online.yml
@@ -16,7 +16,7 @@ jobs:
           fetch-depth: 0
       - name: Install system dependencies
         run: sudo apt-get install -y curl libgmp-dev libmpfr-dev libmpc-dev
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry