diff --git a/lib/userializer.rb b/lib/userializer.rb
index 4679a9b..99c9470 100644
--- a/lib/userializer.rb
+++ b/lib/userializer.rb
@@ -1,6 +1,7 @@
 require 'userializer/version'
 require 'userializer/base_serializer'
 require 'userializer/array_serializer'
+require 'userializer/raw_serializer'
 require 'userializer/composite_serializer'
 
 module USerializer
diff --git a/lib/userializer/composite_serializer.rb b/lib/userializer/composite_serializer.rb
index 5be707b..ed95eea 100644
--- a/lib/userializer/composite_serializer.rb
+++ b/lib/userializer/composite_serializer.rb
@@ -61,7 +61,7 @@ def compose_objs(objs)
       objs.map do |(key, obj)|
         opts = options_for(key)
 
-        if obj.is_a? Enumerable
+        if obj.is_a? Array
           ArraySerializer.new(obj, opts)
         else
           CompositeObject.new(obj, opts)
diff --git a/lib/userializer/raw_serializer.rb b/lib/userializer/raw_serializer.rb
new file mode 100644
index 0000000..81dd729
--- /dev/null
+++ b/lib/userializer/raw_serializer.rb
@@ -0,0 +1,29 @@
+require 'oj'
+
+module USerializer
+  class RawSerializer
+    def initialize(obj, _)
+      @obj = obj
+    end
+
+    def serializable_hash(_)
+      @obj
+    end
+
+    def merge_root(res, key, _, _)
+      res[key] = @obj
+    end
+
+    def to_hash
+      res = {}
+
+      merge_root(res, @root_key, true, nil)
+
+      res
+    end
+
+    def to_json
+      Oj.dump(to_hash, mode: :compat)
+    end
+  end
+end
diff --git a/spec/userializer/composite_serializer_spec.rb b/spec/userializer/composite_serializer_spec.rb
index 7b1faf1..9bbfd6a 100644
--- a/spec/userializer/composite_serializer_spec.rb
+++ b/spec/userializer/composite_serializer_spec.rb
@@ -120,4 +120,21 @@ class Foo
       )
     end
   end
+
+  context 'with raw hash' do
+    it do
+      expect(
+        USerializer::CompositeSerializer.new(
+          {
+            key: foo,
+            bar: { buz: 'value' }
+          },
+          serializer: { bar: USerializer::RawSerializer }
+        ).to_hash
+      ).to eq(
+        key:  { id: 1, bar: 'bar' },
+        bar: { buz: 'value' }
+      )
+    end
+  end
 end