diff --git a/Crypto/requirements.txt b/Crypto/requirements.txt
index bab5d42..a8ba484 100644
--- a/Crypto/requirements.txt
+++ b/Crypto/requirements.txt
@@ -13,4 +13,4 @@ python-dateutil==2.6.1
 pytz==2017.3
 requests==2.18.4
 six==1.11.0
-urllib3==1.22
+urllib3==1.26.5