diff --git a/package-lock.json b/package-lock.json
index 488b7c8..75f48ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,15 @@
 {
     "name": "@hckrnews/objects",
-    "version": "2.2.5",
+    "version": "2.3.0",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "@hckrnews/objects",
-            "version": "2.2.5",
+            "version": "2.3.0",
             "license": "LGPL-3.0",
             "dependencies": {
-                "@hckrnews/validator": "^4.2.3"
+                "@hckrnews/validator": "^4.2.5"
             },
             "devDependencies": {
                 "@babel/core": "^7.9.0",
@@ -1494,9 +1494,9 @@
             }
         },
         "node_modules/@hckrnews/validator": {
-            "version": "4.2.3",
-            "resolved": "https://registry.npmjs.org/@hckrnews/validator/-/validator-4.2.3.tgz",
-            "integrity": "sha512-ivSzKw+1ndkYvi6/P796T0+CCqnEC0Qc/gQ1S6AjsAab4NH0AUgHDb21e6BpgyUMygBsKnIAYLC3vdsZbrfb7w==",
+            "version": "4.2.5",
+            "resolved": "https://registry.npmjs.org/@hckrnews/validator/-/validator-4.2.5.tgz",
+            "integrity": "sha512-SGjA+HgM3TFqtfqcRZZpf4y+6emQBKA3r4UjzIw/eykWbUUB9o2EUk09rLrm9nuEJLGKm/LmEF/FfYIUz4KuMA==",
             "engines": {
                 "node": ">=10"
             }
@@ -16737,9 +16737,9 @@
             "requires": {}
         },
         "@hckrnews/validator": {
-            "version": "4.2.3",
-            "resolved": "https://registry.npmjs.org/@hckrnews/validator/-/validator-4.2.3.tgz",
-            "integrity": "sha512-ivSzKw+1ndkYvi6/P796T0+CCqnEC0Qc/gQ1S6AjsAab4NH0AUgHDb21e6BpgyUMygBsKnIAYLC3vdsZbrfb7w=="
+            "version": "4.2.5",
+            "resolved": "https://registry.npmjs.org/@hckrnews/validator/-/validator-4.2.5.tgz",
+            "integrity": "sha512-SGjA+HgM3TFqtfqcRZZpf4y+6emQBKA3r4UjzIw/eykWbUUB9o2EUk09rLrm9nuEJLGKm/LmEF/FfYIUz4KuMA=="
         },
         "@istanbuljs/load-nyc-config": {
             "version": "1.1.0",
diff --git a/package.json b/package.json
index 9eaa08a..e3477b8 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hckrnews/objects",
     "description": "Hack JavaScript objects",
-    "version": "2.2.5",
+    "version": "2.3.0",
     "author": {
         "name": "Pieter Wigboldus",
         "url": "https://hckr.news/"
@@ -78,6 +78,6 @@
         "flat"
     ],
     "dependencies": {
-        "@hckrnews/validator": "^4.2.3"
+        "@hckrnews/validator": "^4.2.5"
     }
 }
diff --git a/src/__tests__/validate-objects.spec.js b/src/__tests__/validate-objects.spec.js
index 660d4ac..b2d2e42 100644
--- a/src/__tests__/validate-objects.spec.js
+++ b/src/__tests__/validate-objects.spec.js
@@ -11,6 +11,7 @@ describe('Object test', () => {
         city: String,
         country: String,
         build: Function,
+        'example?': 'mixed',
     };
 
     const Address = Obj({ schema: addressSchema });
@@ -26,6 +27,7 @@ describe('Object test', () => {
             city: 'Example',
             country: 'The Netherlands',
             build,
+            example: 'ok',
         });
 
         expect(myAddress).toEqual({
@@ -35,6 +37,7 @@ describe('Object test', () => {
             city: 'Example',
             country: 'The Netherlands',
             build,
+            example: 'ok',
         });
 
         expect(myAddress.keys()).toEqual([
@@ -44,6 +47,7 @@ describe('Object test', () => {
             'city',
             'country',
             'build',
+            'example',
         ]);
     });