diff --git a/dev_requirements.txt b/dev_requirements.txt
index 3ece45a..1cc011b 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -41,5 +41,5 @@ Sphinx==1.6.5
 sphinx-rtd-theme==0.2.4
 sphinxcontrib-websupport==1.0.1
 traitlets==4.3.2
-urllib3==1.22
+urllib3==1.24.2
 wcwidth==0.1.7