dub.json: Expected '"' to start string

[MiyukiNozomi]

Hello, i made a project with DerelictGLFW3, and i am getting a 
error in dub.json at line 11. i don't know soo much about json, 
and i didn't find a solution for this problem anywhere.

this is my dub.json file:

[code]
{
	"name" : "glproject",
	"description" : "GL Game in D.",
	"dependencies": {
	    "derelict-glfw3": "~>4.0.0-beta"
	},
	"subConfigurations": {
	    "derelict-glfw3": "derelict-glfw3-static"
	},
	"libs-windows": {
	    ["glfw3dll"] //error here
	},
	"libs-posix": {
	    ["glfw3"]
	}
}
[code]