diff --git a/index.js b/index.js
index 87e9172..376f3ba 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,58 @@
 var certInfo = module.exports;
 module.exports.certpem = certInfo;
 
+// ES5 version of mergeDeep
+// https://stackoverflow.com/questions/27936772/how-to-deep-merge-instead-of-shallow-merge
+/**
+ * Simple object check.
+ * @param item
+ * @returns {boolean}
+ */
+function isObject(item) {
+  return (item && typeof item === 'object' && !Array.isArray(item));
+}
+
+/**
+ * Deep merge two objects.
+ * @param target
+ * @param ...sources
+ */
+function merge(target) {
+  var sources = Array.prototype.slice.call(arguments);
+  sources.shift();
+  if (!sources.length) { return target; }
+  var source = sources.shift();
+  var obj;
+
+  if (isObject(target) && isObject(source)) {
+    Object.keys(source).forEach(function (key) {
+      if (isObject(source[key])) {
+        if (!target[key]) { obj = {}; obj[key] = {}; Object.assign(target, obj); }
+        merge(target[key], source[key]);
+      } else {
+        obj = {}; obj[key] = source[key];
+        Object.assign(target, obj);
+      }
+    });
+  }
+
+  sources.unshift(target);
+  return merge.apply(null, sources);
+}
+
+var common = require("asn1js/org/pkijs/common");
+var _asn1js = require("asn1js");
+var _pkijs = require("pkijs");
+var _x509schema = require("pkijs/org/pkijs/x509_schema");
+
+// #region Merging function/object declarations for ASN1js and PKIjs
+var asn1js = merge(_asn1js, common);
+
+var x509schema = merge(_x509schema, asn1js);
+
+var pkijs_1 = merge(_pkijs, asn1js);
+var pkijs = merge(pkijs_1, x509schema);
+
 // this is really memory expensive to do
 // (about half of a megabyte of loaded code)
 certInfo._pemToBinAb  = function (pem) {
@@ -15,20 +67,6 @@ certInfo._pemToBinAb  = function (pem) {
 };
 certInfo.debug = certInfo.getCertInfo = function (pem) {
   var ab = module.exports._pemToBinAb(pem);
-  var merge = require("node.extend");
-
-  var common = require("asn1js/org/pkijs/common");
-  var _asn1js = require("asn1js");
-  var _pkijs = require("pkijs");
-  var _x509schema = require("pkijs/org/pkijs/x509_schema");
-
-  // #region Merging function/object declarations for ASN1js and PKIjs
-  var asn1js = merge(true, _asn1js, common);
-
-  var x509schema = merge(true, _x509schema, asn1js);
-
-  var pkijs_1 = merge(true, _pkijs, asn1js);
-  var pkijs = merge(true, pkijs_1, x509schema);
 
   var asn1 = pkijs.org.pkijs.fromBER(ab);
   var certSimpl = new pkijs.org.pkijs.simpl.CERT({ schema: asn1.result });
diff --git a/package.json b/package.json
index 19bab35..1f30017 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "certpem",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Read basic info (subject, altnames, expiresAt, issuedAt) from a cert.pem / x509 certificate (tls / ssl / https) ",
   "main": "index.js",
   "bin": {
@@ -39,9 +39,6 @@
   "homepage": "https://git.coolaj86.com/coolaj86/cert-info.js",
   "dependencies": {
     "asn1js": "^1.2.12",
-    "node.extend": "^1.1.6",
     "pkijs": "^1.3.27"
-  },
-  "trulyOptionalDependencies": {
   }
 }