diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4daa209..64f592a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install PNPM
+      - name: Install pnpm
         uses: pnpm/action-setup@v4.0.0
 
       - name: Install Node.js
diff --git a/package.json b/package.json
index a341b8f..4f6447a 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
   "files": [
     "dist"
   ],
+  "packageManager": "pnpm@9.12.0",
   "scripts": {
     "build": "tsup-node",
     "build:playground": "pnpm -C playground run generate",