diff --git a/luigi/requirements.txt b/luigi/requirements.txt
old mode 100755
new mode 100644
index 74dca85..14a7724
--- a/luigi/requirements.txt
+++ b/luigi/requirements.txt
@@ -98,7 +98,7 @@ tqdm==4.19.5
 traitlets==4.3.2
 unattended-upgrades==0.1
 unidiff==0.5.4
-urllib3==1.22
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 Werkzeug==0.14.1