diff --git a/requirements-dev.txt b/requirements-dev.txt
index 887d1f6..808de82 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -33,7 +33,7 @@ PyYAML==3.12
 requests==2.18.4
 s3transfer==0.1.13
 six==1.11.0
-urllib3==1.22
+urllib3==1.26.5
 websocket-client==0.47.0
 Werkzeug==0.14.1
 whichcraft==0.4.1