diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 2504ef9..b74d8c7 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -11,6 +11,9 @@ jobs:
       fail-fast: false
       matrix:
         node:
+          - 16.0.0
+          - 16
+          - 18.0.0
           - 18
           - 20
           # TODO: Unpin to `22` once parcel incomaptibility with 22.7+ is resolved
diff --git a/package.json b/package.json
index 93ee7ad..7dfb28e 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,9 @@
   "repository": "https://github.com/ethereum/js-ethereum-cryptography",
   "license": "MIT",
   "main": "./index.js",
+  "engines": {
+    "node": "16.x || >= 18.0.0"
+  },
   "files": [
     "bip39/*.js",
     "bip39/*.d.ts",