diff --git a/.github/workflows/npmpublish.yml b/.github/workflows/npmpublish.yml
index 2b8e28e..8d3b549 100644
--- a/.github/workflows/npmpublish.yml
+++ b/.github/workflows/npmpublish.yml
@@ -34,7 +34,10 @@ jobs:
       - uses: pnpm/action-setup@v6
         name: Install pnpm
         with:
-          version: 10
+          # No `version:` here — defer to packageManager in package.json so
+          # we don't clash with etherpad-lite's pnpm version pin (the
+          # checkout above puts its package.json at cwd). See
+          # pnpm/action-setup#225.
           run_install: false
       - name: Get pnpm store directory
         shell: bash
diff --git a/package.json b/package.json
index 888701f..d3cc10d 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "supertest": "^7.0.0",
     "typescript": "^6.0.3"
   },
+  "packageManager": "pnpm@11.0.6",
   "scripts": {
     "lint": "eslint .",
     "lint:fix": "eslint --fix .",