diff --git a/.github/workflows/test-pnpm-v11.yml b/.github/workflows/test-pnpm-v11.yml
new file mode 100644
index 00000000..bfa4481b
--- /dev/null
+++ b/.github/workflows/test-pnpm-v11.yml
@@ -0,0 +1,30 @@
+name: "[TEST] pnpm v11 upgrade"
+on:
+  push:
+    branches: ["test/pnpm-v11-upgrade"]
+  workflow_dispatch:
+
+jobs:
+  test-pnpm-v11:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Setup pnpm v11
+        uses: pnpm/action-setup@v6
+        with:
+          version: latest-11
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: pnpm
+          cache-dependency-path: web/pay-ui/pnpm-lock.yaml
+      - name: Install (from workspace root)
+        run: pnpm install --no-frozen-lockfile --ignore-scripts
+      - name: Prepare (generate .nuxt types)
+        working-directory: web/pay-ui
+        run: pnpm nuxt prepare
+      - name: Build
+        working-directory: web/pay-ui
+        run: pnpm build
+      - name: Verify pnpm version
+        run: pnpm --version
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
new file mode 100644
index 00000000..cf37cfea
--- /dev/null
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,12 @@
+packages:
+  - web/pay-ui
+
+onlyBuiltDependencies:
+  - "@parcel/watcher"
+  - "@sbc-connect/nuxt-auth"
+  - "@sbc-connect/nuxt-base"
+  - "@sbc-connect/nuxt-forms"
+  - "@sbc-connect/nuxt-pay"
+  - "@tailwindcss/oxide"
+  - esbuild
+  - vue-demi
diff --git a/web/pay-ui/package.json b/web/pay-ui/package.json
index e011cf79..b5f63159 100644
--- a/web/pay-ui/package.json
+++ b/web/pay-ui/package.json
@@ -52,5 +52,5 @@
     "vitest": "^3.2.3",
     "vue-tsc": "^3.0.4"
   },
-  "packageManager": "pnpm@10.17.1+sha512.17c560fca4867ae9473a3899ad84a88334914f379be46d455cbf92e5cf4b39d34985d452d2583baf19967fa76cb5c17bc9e245529d0b98745721aa7200ecaf7a"
+  "packageManager": "pnpm@11.9.0"
 }