diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d9d1577..c7e778a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           # 22 = the version deploy.sh actually builds the standalone bundle on.
-          node-version: 22
+          node-version-file: .nvmrc
           cache: npm
           cache-dependency-path: app/package-lock.json
 
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..2bd5a0a
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+22