diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2b5d8cb..5b490a2 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -78,7 +78,7 @@ tox==3.14.0
 tqdm==4.36.1
 traitlets==4.3.3
 twine==1.14.0
-urllib3==1.25.6
+urllib3==1.26.5
 vine==1.3.0
 virtualenv==16.7.7
 watchdog==0.9.0