diff --git a/requirements_dev.txt b/requirements_dev.txt
index 6999eda..e736558 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -21,5 +21,5 @@ six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.4.3
 sphinx-rtd-theme==0.1.9
-urllib3==1.22
+urllib3==1.26.5
 wrapt==1.10.8