diff --git a/.github/workflows/lockfile-version-v20.yml b/.github/workflows/lockfile-version-v20.yml
index 16fb3c3f6..47faece0a 100644
--- a/.github/workflows/lockfile-version-v20.yml
+++ b/.github/workflows/lockfile-version-v20.yml
@@ -18,6 +18,10 @@ jobs:
         run: |
           if [ -f .nvmrc ]; then
             NODE_VERSION=$(cat .nvmrc)
+            if [[ "$NODE_VERSION" != 20* ]]; then
+              echo "ERROR: Node.js version 20 or above is required. Found version $NODE_VERSION in .nvmrc"
+              exit 1
+            fi
             echo "node-version=$NODE_VERSION" >> $GITHUB_ENV
           else
             echo "No .nvmrc file found, defaulting to Node.js v20"