diff --git a/package-lock.json b/package-lock.json
index 215b029..86d52af 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "@hckrnews/validator",
-    "version": "4.2.2",
+    "version": "4.2.3",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "@hckrnews/validator",
-            "version": "4.2.2",
+            "version": "4.2.3",
             "license": "AGPL-3.0",
             "devDependencies": {
                 "@babel/core": "^7.13.14",
@@ -3020,9 +3020,9 @@
             }
         },
         "node_modules/caniuse-lite": {
-            "version": "1.0.30001208",
-            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001208.tgz",
-            "integrity": "sha512-OE5UE4+nBOro8Dyvv0lfx+SRtfVIOM9uhKqFmJeUbGriqhhStgp1A0OyBpgy3OUF8AhYCT+PVwPC1gMl2ZcQMA==",
+            "version": "1.0.30001209",
+            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001209.tgz",
+            "integrity": "sha512-2Ktt4OeRM7EM/JaOZjuLzPYAIqmbwQMNnYbgooT+icoRGrKOyAxA1xhlnotBD1KArRSPsuJp3TdYcZYrL7qNxA==",
             "dev": true
         },
         "node_modules/capture-exit": {
@@ -3682,9 +3682,9 @@
             }
         },
         "node_modules/domhandler": {
-            "version": "4.1.0",
-            "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-4.1.0.tgz",
-            "integrity": "sha512-/6/kmsGlMY4Tup/nGVutdrK9yQi4YjWVcVeoQmixpzjOUK1U7pQkvAPHBJeUxOgxF0J8f8lwCJSlCfD0V4CMGQ==",
+            "version": "4.2.0",
+            "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-4.2.0.tgz",
+            "integrity": "sha512-zk7sgt970kzPks2Bf+dwT/PLzghLnsivb9CcxkvR8Mzr66Olr0Ofd8neSbglHJHaHa2MadfoSdNlKYAaafmWfA==",
             "dev": true,
             "dependencies": {
                 "domelementtype": "^2.2.0"
@@ -3697,14 +3697,14 @@
             }
         },
         "node_modules/domutils": {
-            "version": "2.5.2",
-            "resolved": "https://registry.npmjs.org/domutils/-/domutils-2.5.2.tgz",
-            "integrity": "sha512-MHTthCb1zj8f1GVfRpeZUbohQf/HdBos0oX5gZcQFepOZPLLRyj6Wn7XS7EMnY7CVpwv8863u2vyE83Hfu28HQ==",
+            "version": "2.6.0",
+            "resolved": "https://registry.npmjs.org/domutils/-/domutils-2.6.0.tgz",
+            "integrity": "sha512-y0BezHuy4MDYxh6OvolXYsH+1EMGmFbwv5FKW7ovwMG6zTPWqNPq3WF9ayZssFq+UlKdffGLbOEaghNdaOm1WA==",
             "dev": true,
             "dependencies": {
                 "dom-serializer": "^1.0.1",
                 "domelementtype": "^2.2.0",
-                "domhandler": "^4.1.0"
+                "domhandler": "^4.2.0"
             },
             "funding": {
                 "url": "https://github.com/fb55/domutils?sponsor=1"
@@ -13997,9 +13997,9 @@
             "dev": true
         },
         "caniuse-lite": {
-            "version": "1.0.30001208",
-            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001208.tgz",
-            "integrity": "sha512-OE5UE4+nBOro8Dyvv0lfx+SRtfVIOM9uhKqFmJeUbGriqhhStgp1A0OyBpgy3OUF8AhYCT+PVwPC1gMl2ZcQMA==",
+            "version": "1.0.30001209",
+            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001209.tgz",
+            "integrity": "sha512-2Ktt4OeRM7EM/JaOZjuLzPYAIqmbwQMNnYbgooT+icoRGrKOyAxA1xhlnotBD1KArRSPsuJp3TdYcZYrL7qNxA==",
             "dev": true
         },
         "capture-exit": {
@@ -14524,23 +14524,23 @@
             }
         },
         "domhandler": {
-            "version": "4.1.0",
-            "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-4.1.0.tgz",
-            "integrity": "sha512-/6/kmsGlMY4Tup/nGVutdrK9yQi4YjWVcVeoQmixpzjOUK1U7pQkvAPHBJeUxOgxF0J8f8lwCJSlCfD0V4CMGQ==",
+            "version": "4.2.0",
+            "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-4.2.0.tgz",
+            "integrity": "sha512-zk7sgt970kzPks2Bf+dwT/PLzghLnsivb9CcxkvR8Mzr66Olr0Ofd8neSbglHJHaHa2MadfoSdNlKYAaafmWfA==",
             "dev": true,
             "requires": {
                 "domelementtype": "^2.2.0"
             }
         },
         "domutils": {
-            "version": "2.5.2",
-            "resolved": "https://registry.npmjs.org/domutils/-/domutils-2.5.2.tgz",
-            "integrity": "sha512-MHTthCb1zj8f1GVfRpeZUbohQf/HdBos0oX5gZcQFepOZPLLRyj6Wn7XS7EMnY7CVpwv8863u2vyE83Hfu28HQ==",
+            "version": "2.6.0",
+            "resolved": "https://registry.npmjs.org/domutils/-/domutils-2.6.0.tgz",
+            "integrity": "sha512-y0BezHuy4MDYxh6OvolXYsH+1EMGmFbwv5FKW7ovwMG6zTPWqNPq3WF9ayZssFq+UlKdffGLbOEaghNdaOm1WA==",
             "dev": true,
             "requires": {
                 "dom-serializer": "^1.0.1",
                 "domelementtype": "^2.2.0",
-                "domhandler": "^4.1.0"
+                "domhandler": "^4.2.0"
             }
         },
         "ecc-jsbn": {
diff --git a/package.json b/package.json
index f028d2f..8ba8822 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hckrnews/validator",
-    "version": "4.2.2",
+    "version": "4.2.3",
     "description": "Object validator",
     "main": "src/validator.js",
     "files": [
diff --git a/src/validator.js b/src/validator.js
index cfb415d..1eb4990 100644
--- a/src/validator.js
+++ b/src/validator.js
@@ -106,7 +106,9 @@ class Validator {
         if (!(fieldType in types)) {
             const validationMethod = `validate${value.constructor.name}`;
 
-            return this[validationMethod](value, fieldType);
+            return this[validationMethod]
+                ? this[validationMethod](value, fieldType)
+                : false;
         }
 
         const type = types[fieldType];
diff --git a/tests/unit/validator.spec.js b/tests/unit/validator.spec.js
index 06b9e0c..2aa7792 100644
--- a/tests/unit/validator.spec.js
+++ b/tests/unit/validator.spec.js
@@ -11,7 +11,7 @@ const test2 = new Test2('me');
 
 const testCases = [
     {
-        description: 'A valid test',
+        description: 'A valid test with a custom type',
         input: {
             name: 'test',
             test: test2,
@@ -20,6 +20,16 @@ const testCases = [
         expectedValue: true,
         expectedErrors: [],
     },
+    {
+        description: 'A invalid test with a custom type',
+        input: {
+            name: 'test',
+            test: 'test',
+        },
+        schema: test1Schema,
+        expectedValue: false,
+        expectedErrors: [['test', Test2]],
+    },
     {
         description: 'A valid bar',
         input: {