diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index e4c863a..a625ffd 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.13.3
+current_version = 0.13.4
 tag = True
 tag_name = {new_version}
 commit = True
diff --git a/openapi_core/__init__.py b/openapi_core/__init__.py
index 4f172c6..793c82e 100644
--- a/openapi_core/__init__.py
+++ b/openapi_core/__init__.py
@@ -6,7 +6,7 @@ from openapi_core.shortcuts import (
 
 __author__ = 'Artur Maciag'
 __email__ = 'maciag.artur@gmail.com'
-__version__ = '0.13.3'
+__version__ = '0.13.4'
 __url__ = 'https://github.com/p1c2u/openapi-core'
 __license__ = 'BSD 3-Clause License'