diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e0464de9..8ebd5baf 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,3 +1,3 @@
-### 0.9.14 February 13 2020 ####
+### 0.9.15 February 27 2020 ####
 
-* [Added support for serializing and deserializing `IDictionary<TKey, TValue>` with private and protected default constructor] (https://github.com/akkadotnet/Hyperion/pull/162)
+* [Fix `Type.GetGenericTypeDefinition()` interface error](https://github.com/akkadotnet/Hyperion/pull/166)
diff --git a/src/Hyperion.Tests/GenericDictionarySerializerTests.cs b/src/Hyperion.Tests/GenericDictionarySerializerTests.cs
index a26882ec..0bbffbcf 100644
--- a/src/Hyperion.Tests/GenericDictionarySerializerTests.cs
+++ b/src/Hyperion.Tests/GenericDictionarySerializerTests.cs
@@ -71,10 +71,15 @@ public ProtectedCustomDictionary(Dictionary<TKey, TValue> dict) : base(new Dicti
             { }
         }
 
+        // Dictionary serializer fails to fetch the generic IDictionary interface if
+        // Type.GetInterfaces() returns a non-generic interface before the IDictionary interface
         /// <summary>
         /// Just a custom class wrapper for another <see cref="IDictionary{TKey,TValue}"/>
         /// </summary>
-        class CustomDictionary<TKey, TValue> : IDictionary<TKey, TValue>
+        class CustomDictionary<TKey, TValue> :
+            IEnumerable, 
+            IDictionary<TKey, TValue>, 
+            IEquatable<CustomDictionary<TKey, TValue>>
         {
             private readonly IDictionary<TKey, TValue> _dictGeneric;
 
@@ -162,6 +167,11 @@ public bool TryGetValue(TKey key, out TValue value)
                 return _dictGeneric.TryGetValue(key, out value);
             }
 
+            public bool Equals(CustomDictionary<TKey, TValue> other)
+            {
+                return true;
+            }
+
             /// <inheritdoc />
             public TValue this[TKey key]
             {
diff --git a/src/Hyperion/SerializerFactories/DictionarySerializerFactory.cs b/src/Hyperion/SerializerFactories/DictionarySerializerFactory.cs
index 04169a9f..8d6a2715 100644
--- a/src/Hyperion/SerializerFactories/DictionarySerializerFactory.cs
+++ b/src/Hyperion/SerializerFactories/DictionarySerializerFactory.cs
@@ -97,7 +97,10 @@ public override ValueSerializer BuildSerializer(Serializer serializer, Type type
 
         private GenericDictionaryTypes GetKeyValuePairType(Type dictImplementationType)
         {
-            var dictInterface = dictImplementationType.GetInterfaces().First(i => i.GetGenericTypeDefinition() == typeof (IDictionary<,>));
+            var dictInterface = dictImplementationType
+                .GetInterfaces()
+                .Where(i => i.GetTypeInfo().IsGenericType)
+                .First(i => i.GetGenericTypeDefinition() == typeof(IDictionary<,>));
             var keyType = dictInterface.GetGenericArguments()[0];
             var valueType = dictInterface.GetGenericArguments()[1];
             return new GenericDictionaryTypes()
diff --git a/src/common.props b/src/common.props
index 5235b284..1dbec836 100644
--- a/src/common.props
+++ b/src/common.props
@@ -2,8 +2,8 @@
   <PropertyGroup>
     <Copyright>Copyright © 2016-2017 Akka.NET Team</Copyright>
     <Authors>Akka.NET Team</Authors>
-    <VersionPrefix>0.9.13</VersionPrefix>
-    <PackageReleaseNotes>[Added support for serializing and deserializing `IDictionary&lt;TKey, TValue&gt;`](https://github.com/akkadotnet/Hyperion/pull/156)</PackageReleaseNotes>
+    <VersionPrefix>0.9.15</VersionPrefix>
+    <PackageReleaseNotes>[Fix `Type.GetGenericTypeDefinition()` interface error](https://github.com/akkadotnet/Hyperion/pull/166)</PackageReleaseNotes>
     <PackageIconUrl>http://getakka.net/images/akkalogo.png</PackageIconUrl>
     <PackageProjectUrl>https://github.com/akkadotnet/Hyperion</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/akkadotnet/Hyperion/blob/master/LICENSE</PackageLicenseUrl>