diff --git a/requirements.txt b/requirements.txt
index e129dee..f8d37c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,4 @@ pytz==2017.2
 requests==2.17.3
 six==1.10.0
 twilio==6.3.0
-urllib3==1.21.1
+urllib3==1.26.5