diff --git a/requirements.txt b/requirements.txt
index fe3773b..5145e9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,6 +29,6 @@ rsa==3.4.2
 six==1.11.0
 sqlalchemy==1.2.10
 uritemplate==3.0.0
-urllib3==1.23; python_version >= '2.6'
+urllib3==1.26.5; python_version >= '2.6'
 werkzeug==0.14.1
 wtforms==2.2.1