diff --git a/.github/workflows/deploy_to_gh_pages.yml b/.github/workflows/deploy_to_gh_pages.yml
index b2c7411..c46e1f8 100644
--- a/.github/workflows/deploy_to_gh_pages.yml
+++ b/.github/workflows/deploy_to_gh_pages.yml
@@ -28,6 +28,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 8
       - name: Build
         run: |
           pnpm i