diff --git a/Chapter02/musicterminal/requirements.txt b/Chapter02/musicterminal/requirements.txt
index bd1d23f..bf4f6e2 100644
--- a/Chapter02/musicterminal/requirements.txt
+++ b/Chapter02/musicterminal/requirements.txt
@@ -1,3 +1,3 @@
 requests==2.18.1
 Flask==0.12.2
-PyYAML==3.12
+PyYAML==5.4