diff --git a/requirements.txt b/requirements.txt
index f0b035b..c0b9607 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.2
 sphinxcontrib-serializinghtml==1.1.3
 tornado==6.0.3
-urllib3==1.25.3
+urllib3==1.26.5
 watchdog==0.9.0
 sphinxcontrib-disqus==1.1.0
 sphinxcontrib-applehelp==1.0.1