diff --git a/OJExec-Python/requirements.txt b/OJExec-Python/requirements.txt
old mode 100755
new mode 100644
index cc61fd7..1060f46
--- a/OJExec-Python/requirements.txt
+++ b/OJExec-Python/requirements.txt
@@ -41,7 +41,7 @@ six==1.15.0
 SQLAlchemy==1.3.20
 sqlparse==0.4.1
 toml==0.10.2
-tornado==6.1
+tornado==6.3.2
 vine==5.0.0
 wcwidth==0.2.5
 Werkzeug==1.0.1