diff --git a/requirements-dev.txt b/requirements-dev.txt
index 58ee42e..f390aa6 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -26,5 +26,5 @@ six==1.11.0
 snowballstemmer==1.2.1
 sphinx==1.7.5
 sphinxcontrib-websupport==1.1.0
-urllib3==1.23
+urllib3==1.24.2
 yapf==0.22.0