diff --git a/Main/14_data.md b/Main/14_data.md
index ab2af4b..fa87a92 100644
--- a/Main/14_data.md
+++ b/Main/14_data.md
@@ -96,7 +96,7 @@ A Core Data stack is composed of the following objects: one or more managed obje
 4. A managed object model that describes the entities in the stores.
 5. A managed object context that provides a scratch pad for managed objects.
 
-<img src="https://github.com/sashakid/ios-guide/blob/master/Images/core_data_stack.png">
+<img src="https://github.com/sashakid/ios-guide/blob/master/Images/core_data_stack.jpg">
 
 1. Persistent store