diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e477a8..fde855d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x]
+        node-version: [16.x, 18.15.x, 18.x, 20.x]
         platform:
         - os: ubuntu-latest
           shell: bash
diff --git a/package.json b/package.json
index 3e35bf9..199ffb4 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "coverage-map": "map.js"
   },
   "engines": {
-    "node": "16 >=16.17 || 18 >=18.16.0 || >=20.6.1"
+    "node": "16 >=16.17 || 18 >=18.15.0 || >=20.6.1"
   },
   "repository": "https://github.com/isaacs/tshy",
   "keywords": [