diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index 36fe2af..cc30f4e 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -15,14 +15,14 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10
+          version: 10.20.0
           run_install: false
 
       - name: Install Node.js
         uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: 'pnpm'
+          cache: "pnpm"
 
       - name: Install dependencies
         run: pnpm install
diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 241204f..6bfc68e 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -16,6 +16,9 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
+        with:
+          version: 10.20.0
+          run_install: false
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
diff --git a/package.json b/package.json
index 7915245..a30f910 100644
--- a/package.json
+++ b/package.json
@@ -23,5 +23,6 @@
   "devDependencies": {
     "typescript": "^5.9.3",
     "wrangler": "^4.45.3"
-  }
+  },
+  "packageManager": "pnpm@10.20.0"
 }