diff --git a/requirements.txt b/requirements.txt
index ab0a195..a389d89 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,6 +27,6 @@ six==1.11.0
 sparkpost==1.3.6
 tox==3.2.1
 twilio==6.16.1
-urllib3==1.23
+urllib3==1.26.5
 virtualenv==16.0.0
 wrapt==1.10.11