diff --git a/requirements.txt b/requirements.txt
index 1b41426..d8a3309 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,5 +18,5 @@ pytz==2017.3
 requests==2.18.4
 six==1.11.0
 sympy==1.1.1
-urllib3==1.22
+urllib3==1.26.5
 Werkzeug==0.14.1