diff --git a/docs/requirements.txt b/docs/requirements.txt
index 80fb822..1b11a9b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -20,4 +20,4 @@ snowballstemmer==1.2.1
 Sphinx==1.6.5
 sphinx-rtd-theme==0.2.4
 sphinxcontrib-websupport==1.0.1
-urllib3==1.22
+urllib3==1.23