diff --git a/assignment3/requirements.txt b/assignment3/requirements.txt
old mode 100755
new mode 100644
index 8273b61..949eede
--- a/assignment3/requirements.txt
+++ b/assignment3/requirements.txt
@@ -8,7 +8,7 @@ attrs==18.1.0
 backports-abc==0.4
 backports.ssl-match-hostname==3.5.0.1
 bleach==1.5.0
-certifi==2015.11.20.1
+certifi==2022.12.7
 chardet==3.0.4
 cycler==0.10.0
 Cython==0.25.2