diff --git a/requirements.txt b/requirements.txt
index d9509d2..e372282 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ pytz==2016.4
 requests==2.9.1
 six==1.10.0
 tornado==4.2
-urllib3==1.15.1
+urllib3==1.26.5
 Werkzeug==0.11.9
 wheel==0.24.0
 WTForms==2.1