diff --git a/cs231n/assignment1/requirements.txt b/cs231n/assignment1/requirements.txt
old mode 100755
new mode 100644
index 4d9577c..18b26dd
--- a/cs231n/assignment1/requirements.txt
+++ b/cs231n/assignment1/requirements.txt
@@ -42,7 +42,7 @@ Pillow==6.0.0
 prometheus-client==0.6.0
 prompt-toolkit==2.0.9
 ptyprocess==0.6.0
-Pygments==2.3.1
+Pygments==2.7.4
 pyparsing==2.3.1
 pyrsistent==0.14.11
 python-dateutil==2.8.0