diff --git a/requirements.txt b/requirements.txt
index 085fa1d..5e9e19c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,4 @@ iso8601==0.1.11
 python-mimeparse==1.6.0
 requests==2.18.1
 six==1.10.0
-urllib3==1.21.1
+urllib3==1.26.5