diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index b9e30c76..9e0c4f83 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -14,19 +14,17 @@ jobs:
         uses: actions/setup-node@v2.1.2
         with:
           node-version: "12.x"
-      - name: Get yarn cache
-        id: yarn-cache
-        run: echo "::set-output name=dir::$(yarn cache dir)"
       - name: Cache dependencies
         uses: actions/cache@v2
         with:
-          path: ${{ steps.yarn-cache.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+           # npm キャッシュファイルは Linux/macOS の `~/.npm` に保存される
+          path: ~/.npm
+          key: ${{ runner.os }}-npm-${{ hashFiles('**/package-lock.json') }}
           restore-keys: |
-            ${{ runner.os }}-yarn-
-      - run: yarn install --frozen-lockfile
-      - run: yarn build
-      - run: yarn export
+            ${{ runner.os }}-npm-
+      - run: npm ci
+      - run: npm run build
+      - run: npm run export
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3.7.3
         with: