diff --git a/requirements_dev.txt b/requirements_dev.txt
index a5bd712..d968c4f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -31,5 +31,5 @@ snowballstemmer==1.2.1
 Sphinx==1.6.3
 sphinxcontrib-websupport==1.0.1
 tox==2.7.0
-urllib3==1.22
+urllib3==1.26.5
 watchdog==0.8.3