diff --git a/requirements.txt b/requirements.txt
index c52024f7..a9c2b566 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -91,7 +91,7 @@ testpath==0.3.1
 tornado==4.3
 tqdm==4.26.0
 traitlets==4.3.2
-urllib3==1.21.1
+urllib3==1.24.2
 uWSGI==2.0.12
 webencodings==0.5
 Werkzeug==0.14.1