diff --git a/requirements-dev.txt b/requirements-dev.txt
index a8bfc68..d9664fc 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -27,7 +27,7 @@ pytest==3.2.2
 pytz==2017.2 # via babel
 redis==2.10.6             # via django-redis
 selenium==3.5.0
-six==1.10.0               # via django-appconf, sphinx, sphinxcontrib-spelling
+six==1.11.0               # via django-appconf, sphinx, sphinxcontrib-spelling
 snowballstemmer==1.2.1    # via sphinx
 sphinx-rtd-theme==0.2.4   # via sphinx
 sphinx==1.6.3