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@@ -285,7 +285,7 @@ It's a great way to learn.
 * [**C++**: _3D Physics Engine Tutorial_](https://www.youtube.com/playlist?list=PLEETnX-uPtBXm1KEr_2zQ6K_0hoGH6JJ0) [video]
 * [**JavaScript**: _How Physics Engines Work_](http://buildnewgames.com/gamephysics/)
 * [**JavaScript**: _Broad Phase Collision Detection Using Spatial Partitioning_](http://buildnewgames.com/broad-phase-collision-detection/)
-* [**JavaScript**: _Build a simple 2D physics engine for JavaScript games_](https://www.ibm.com/developerworks/library/wa-build2dphysicsengine/index.html)
+* [**JavaScript**: _Build a simple 2D physics engine for JavaScript games_](https://developer.ibm.com/tutorials/wa-build2dphysicsengine/?mhsrc=ibmsearch_a&mhq=2dphysic)
 
 #### Build your own `Programming Language`