diff --git a/core/requirements.txt b/core/requirements.txt
old mode 100755
new mode 100644
index 161c9cf..04dfe2c
--- a/core/requirements.txt
+++ b/core/requirements.txt
@@ -103,7 +103,7 @@ toml==0.10.0
 tornado==5.1.1
 traitlets==4.3.2
 typed-ast==1.1.1
-urllib3==1.24.1
+urllib3==1.26.5
 vine==1.3.0
 virtualenv==16.6.1
 wcwidth==0.1.7