diff --git a/docs/source/requirements.txt b/docs/source/requirements.txt
index 2527e28..240935d 100644
--- a/docs/source/requirements.txt
+++ b/docs/source/requirements.txt
@@ -22,4 +22,4 @@ snowballstemmer==1.2.1
 Sphinx==1.8.3
 sphinx-rtd-theme==0.4.2
 sphinxcontrib-websupport==1.1.0
-urllib3==1.24.2
+urllib3==1.26.5