grunt-ts: Exclude not working correctly with typescript 1.8.2

with typescript 1.7.5 works fine: When I upgrade to 1.8.2 it fails: Looks like the exclude directory is not working correctly. Edit: I am using a tsconfig.json file:

{
"compilerOptions": {
"target": "es5",
"module": "system",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": false,
"rootDir": "app",
"outDir": "dist"
},
"exclude": [
"node_modules",
"bower_components",
"typings/main",
"typings/main.d.ts"
]
}