Edit constrained sketch to update solid geometry?

I have created a constrained sketch, and then revolved it (using "pull") to create a 3D solid model. 

Now I want to go back to the sketch and change it. I then hope to see that the solid geometry gets updated since the preceding sketch is changed. But this doesn't happen. Is this intended functionality, or am I doing something wrong? 

In the attached picture, I have changed the sketch but the revolved cone doesn't update. 

(Beginner, trying to learn DesignSpark Mechanical)