diff --git a/docs/requirements.txt b/docs/requirements.txt
index ca0b8dd..d6d7382 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -31,4 +31,4 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.2
 sphinxcontrib-serializinghtml==1.1.3
 tornado==4.3
-urllib3==1.24.3
+urllib3==1.26.5