diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 34ac042..2d7d1fa 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ jobs:
       - name: setup node v20
         uses: actions/setup-node@v4
         with:
-          node-version: 20.18.1 # match .tool-versions file
+          node-version: 20.18.0 # match .tool-versions file
       - name: install
         run: npm ci
       - name: tests
diff --git a/.tool-versions b/.tool-versions
index e8fc3f8..f31e6b0 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-nodejs 20.18.1
+nodejs 20.18.0
diff --git a/package.json b/package.json
index f4828b3..fde00cf 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "test:watch": "vitest --watch"
   },
   "engines": {
-    "node": ">=20.0.0"
+    "node": ">=20.18.0"
   },
   "keywords": [
     "AWS Lambda",