diff --git a/courses/free-courses-en.md b/courses/free-courses-en.md
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--- a/courses/free-courses-en.md
+++ b/courses/free-courses-en.md
@@ -823,6 +823,7 @@
 ### Swift
 
 * [100 days of Swift](https://www.hackingwithswift.com/100) - Hacking With Swift
+* [Data Structures and Algorithms in Swift](https://www.udacity.com/course/data-structures-and-algorithms-in-swift--ud1011) - Udacity
 * [How To Make An App For Beginners (iOS/Swift - 2019)](https://www.udemy.com/how-to-make-an-app-for-beginners-iosswift-2019/) - Chris Ching (Udemy)
 * [Learn Swift](https://www.youtube.com/playlist?list=PLMRqhzcHGw1ZqzYnpIuQAn2rcjhOtbqGX) - CodeWithChris
 * [Swiftris - Build an iOS Tetris app from scratch](https://www.bloc.io/swiftris-build-your-first-ios-game-with-swift)