diff --git a/.github/workflows/main-test.yml b/.github/workflows/main-test.yml
index acb57dd..e1e7afb 100644
--- a/.github/workflows/main-test.yml
+++ b/.github/workflows/main-test.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [14.x, 16.x]
+        node-version: [14.x, '16.8']
     steps:
       - name: Checkout
         uses: actions/checkout@v2