diff --git a/Chapter-4/activity_2/requirements.txt b/Chapter-4/activity_2/requirements.txt
index 424e5fb..ffb9d5d 100644
--- a/Chapter-4/activity_2/requirements.txt
+++ b/Chapter-4/activity_2/requirements.txt
@@ -53,7 +53,7 @@ prompt-toolkit==1.0.15
 protobuf==3.5.0.post1
 ptyprocess==0.5.2
 pydot==1.2.3
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.3