diff --git a/requirements-dev.txt b/requirements-dev.txt
index b1f79d9..59bf5e3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -69,6 +69,6 @@ SQLAlchemy==1.1.5
 tornado==4.4.2
 twilio==6.0.0
 uritemplate==3.0.0
-urllib3==1.20
+urllib3==1.26.5
 watchdog==0.8.3
 Werkzeug==0.12.1