diff --git a/recommonmark/__init__.py b/recommonmark/__init__.py
index 0404d81..abeeedb 100644
--- a/recommonmark/__init__.py
+++ b/recommonmark/__init__.py
@@ -1 +1 @@
-__version__ = '0.3.0'
+__version__ = '0.4.0'
diff --git a/setup.py b/setup.py
index 7c941f8..e4c1fb0 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@ import recommonmark
 setup(name='recommonmark',
       version=recommonmark.__version__,
       install_requires=[
-          'commonmark>=0.5.4',
+          'commonmark<=0.5.4',
           'docutils>=0.11'
       ],
       entry_points={'console_scripts': [