diff --git a/OJExec-Python/requirements.txt b/OJExec-Python/requirements.txt
old mode 100755
new mode 100644
index cc61fd7..a2acf06
--- a/OJExec-Python/requirements.txt
+++ b/OJExec-Python/requirements.txt
@@ -35,7 +35,7 @@ python-dateutil==2.8.1
 python-decouple==3.3
 python-editor==1.0.4
 pytz==2020.4
-redis==3.5.3
+redis==4.3.6
 requests==2.25.1
 six==1.15.0
 SQLAlchemy==1.3.20