diff --git a/requirements.txt b/requirements.txt
index 3392d74..67fbef4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,4 @@ olefile==0.44
 Pillow==4.1.1
 pytz==2017.2
 requests==2.18.1
-urllib3==1.21.1
+urllib3==1.26.5