diff --git a/requirements-dev.txt b/requirements-dev.txt
index a8d71f7..38bd28a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,4 +6,4 @@ pytest==3.2.2
 pytest-cov==2.5.1
 
 # Documentation
-Sphinx==1.3.1
+Sphinx==1.6.3