diff --git a/doc/build.py b/doc/build.py
index 91a6260d..f08d570d 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -51,7 +51,8 @@ def create_build_env(dirname='virtualenv'):
   pip_install('sphinx-doc/sphinx', '12b83372ac9316e8cbe86e7fed889296a4cc29ee',
               min_version='1.4.1.dev20160531')
   pip_install('michaeljones/breathe',
-              '6b1c5bb7a1866f15fc328b8716258354b10c1daa')
+              '6b1c5bb7a1866f15fc328b8716258354b10c1daa',
+              min_version='4.2.0')
 
 def build_docs(version='dev', **kwargs):
   doc_dir = kwargs.get('doc_dir', os.path.dirname(os.path.realpath(__file__)))