diff --git a/Extensions/TypeExtensions.cs b/Extensions/TypeExtensions.cs
new file mode 100644
index 0000000..5967cb9
--- /dev/null
+++ b/Extensions/TypeExtensions.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace HabitSharp.Extensions {
+    public static class TypeExtensions {
+        public static bool IsOrSubclass(this Type type, Type baseType) {
+            return type == baseType || type.IsSubclassOf(baseType);
+        }
+    }
+}
diff --git a/Serialization/NotificationConverter.cs b/Serialization/NotificationConverter.cs
index 8234a50..3e3217f 100644
--- a/Serialization/NotificationConverter.cs
+++ b/Serialization/NotificationConverter.cs
@@ -3,6 +3,7 @@ using System.Linq;
 using System.Collections.Generic;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
+using HabitSharp.Extensions;
 using HabitSharp.Notifications;
 
 /// <summary>
@@ -29,7 +30,7 @@ public class NotificationConverter : JsonConverter
             ) ?? typeof(Notification); // Default to the Notification class
     }
 
-    public override bool CanConvert(Type objectType) => objectType.IsSubclassOf(typeof(Notification)) || objectType == typeof(Notification);
+    public override bool CanConvert(Type objectType) => objectType.IsOrSubclass(typeof(Notification));
 
     public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
     {