diff --git a/E13RoomShoppingList/README.md b/E13RoomShoppingList/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..5b1d6818235edf5bfb3c865658603c380b4f4b2b
--- /dev/null
+++ b/E13RoomShoppingList/README.md
@@ -0,0 +1 @@
+App preview [video]()
diff --git a/README.md b/README.md
index 63826ef7d5ed92dbfb432674f844c30c80762e3e..10de94e5e4cffdbcca8b3f748e46693a318f9b23 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Iftakhar Husan
 - [Exercise 9's][ex9] requirements are satisfied by [Exercise 8][ex8]
 - [Exercise 10][ex10]
 - [Exercise 11's][ex11] requirements are satisfied by [Exercise 10][ex10]
-- [Exercise 12's][ex12] requirements are satisfied by [Exercise 11][ex10]
+- [Exercise 12's][ex12] requirements are satisfied by [Exercise 10][ex10]
 - [Exercise 13][ex13]
 - [Exercise 14][ex14]
 - [Exercise 15][ex15]
@@ -35,7 +35,7 @@ Iftakhar Husan
 [ex10]: ./E10FavouriteCities/
 [ex11]: ./E10FavouriteCities/
 [ex12]: ./E10FavouriteCities/
-[ex13]: ./
+[ex13]: ./E13RoomShoppingList/
 [ex14]: ./
 [ex15]: ./
 [ex16]: ./