diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index cd282e7d..a60015bb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,10 @@
 Changelog
 =========
 
+4.9.1 (2017-09-19)
+------------------
+- Properly marshal a model even if it's not created from the same ``Spec`` instance - PR #194.
+
 4.9.0 (2017-09-11)
 ------------------
 - ``type`` is no longer required. By default, validation will not be performed if ``type`` is omitted. This is configurable with ``default_type_to_object`` - Issue #166, #192, PR #183, #193
diff --git a/bravado_core/__init__.py b/bravado_core/__init__.py
index bfa4b212..62af5e73 100644
--- a/bravado_core/__init__.py
+++ b/bravado_core/__init__.py
@@ -1,2 +1,2 @@
 # -*- coding: utf-8 -*-
-version = '4.9.0'
+version = '4.9.1'