diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1a905b3cf..f8824a025 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -127,6 +127,14 @@ jobs:
           echo "$HOME/NJOY2016/build" >> $GITHUB_PATH
           $GITHUB_WORKSPACE/tools/ci/gha-install.sh
 
+      - name: cache-xs
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/nndc_hdf5
+            ~/endf-b-vii.1
+          key: ${{ runner.os }}-build-xs-cache
+      
       - name: before
         shell: bash
         run: $GITHUB_WORKSPACE/tools/ci/gha-before-script.sh