From 8078ece8a777da5f57dc34635d17ccc8b5112090 Mon Sep 17 00:00:00 2001
From: Blake Embrey <hello@blakeembrey.com>
Date: Tue, 19 Aug 2025 19:00:53 -0700
Subject: [PATCH] Build package as ESM

---
 .github/workflows/ci.yml | 2 +-
 package.json             | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3670433..967a507 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - "18"
+          - "20"
           - "*"
     steps:
       - uses: actions/checkout@v4
diff --git a/package.json b/package.json
index 58cd9bd..2686214 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,8 @@
     "url": "https://opencollective.com/express"
   },
   "license": "MIT",
+  "sideEffects": false,
+  "type": "module",
   "exports": "./dist/index.js",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
@@ -45,7 +47,7 @@
     "vitest": "^3.0.5"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   },
   "publishConfig": {
     "access": "public"
@@ -53,7 +55,7 @@
   "size-limit": [
     {
       "path": "dist/index.js",
-      "limit": "2 kB"
+      "limit": "1.85 kB"
     }
   ],
   "ts-scripts": {