diff --git a/setup.py b/setup.py
index 2144324..7ea91b5 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
     with open(readme_file) as f:
         readme = f.read()
 
-install_requires = ['mistune', 'docutils']
+install_requires = ['mistune<1', 'docutils<1']
 test_requirements = ['pygments']
 if sys.version_info < (3, 3):
     test_requirements.append('mock')