diff --git a/requirements.txt b/requirements.txt
index 853ea2f..f56f09d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ rlp==1.0.2
 rsa==3.4.2
 six==1.11.0
 toolz==0.9.0
-urllib3==1.23
+urllib3==1.26.5
 web3==4.7.1
 websockets==6.0
 Werkzeug==0.14.1