diff --git a/README.md b/README.md
index 339a43fb..996d7cfa 100644
--- a/README.md
+++ b/README.md
@@ -774,7 +774,7 @@ To create custom serializers and/or deserializers, define:
 e.g.
 
 ```javascript
-serDes: [{
+serDes: [
    // installs dateTime serializer and deserializer
   OpenApiValidator.serdes.dateTime,
   // installs date serializer and deserializer
@@ -784,8 +784,8 @@ serDes: [{
     format: 'mongo-objectid',
     deserialize: (s) => new ObjectID(s),
     serialize: (o) => o.toString(),
-  }
-}],
+  },
+],
 ```
 
 The mongo serializers will trigger on the following schema:
diff --git a/src/framework/ajv/index.ts b/src/framework/ajv/index.ts
index 75660e19..bd5a6f77 100644
--- a/src/framework/ajv/index.ts
+++ b/src/framework/ajv/index.ts
@@ -55,7 +55,12 @@ function createAjv(
                   ];
                   return false;
                 }
-                obj[propName] = sch.deserialize(data);
+                try {
+                  obj[propName] = sch.deserialize(data);
+                }
+                catch(e) {
+                  return false;
+                }
               }
               return true;
             };
@@ -99,7 +104,12 @@ function createAjv(
             return function validate(data, path, obj, propName) {
               if (typeof data === 'string') return true;
               if (!!sch.serialize) {
-                obj[propName] = sch.serialize(data);
+                try {
+                  obj[propName] = sch.serialize(data);
+                }
+                catch(e) {
+                  return false;
+                }
               }
               return true;
             };