diff --git a/Class4/shoppingcart_pom/requirements.txt b/Class4/shoppingcart_pom/requirements.txt
old mode 100755
new mode 100644
index b68d8e8..7d3015b
--- a/Class4/shoppingcart_pom/requirements.txt
+++ b/Class4/shoppingcart_pom/requirements.txt
@@ -4,4 +4,4 @@ selenium==3.141.0
 colorama==0.4.3
 openpyxl==3.0.3
 pillow==7.0.0
-pyyaml==5.3
+pyyaml==5.4