Overriding interface property type defined in Typescript d.ts file

Is there a way to change the type of interface property defined in a *.d.ts in typescript? for example: An interface in x.d.ts is defined as interface A { property: number; } I want to change it in the typescript files that I write to interface A { property: Object; } or even this would work interface B extends A { property: Object; } Will this approach work? It didn't work when I tried on my syst