diff --git a/jake/jake.d.ts b/jake/jake.d.ts
index 1812b818b7..95614374cc 100644
--- a/jake/jake.d.ts
+++ b/jake/jake.d.ts
@@ -40,6 +40,16 @@ declare function fail(...err:any[]): void;
  */
 declare function file(name:string, prereqs?:string[], action?:()=>void, opts?:jake.FileTaskOptions): jake.FileTask;
 
+/**
+ * Creates Jake FileTask from regex patterns
+ * @name name/pattern of the Task
+ * @param source calculated from the name pattern
+ * @param prereqs Prerequisites to be run before this task
+ * @param action The action to perform for this task
+ * @param opts Perform this task asynchronously. If you flag a task with this option, you must call the global `complete` method inside the task's action, for execution to proceed to the next task.
+ */
+declare function rule(pattern: RegExp, source: string | { (name: string): string; }, prereqs?: string[], action?: () => void, opts?: jake.TaskOptions): void;
+
 /**
  * Creates a namespace which allows logical grouping of tasks, and prevents name-collisions with task-names. Namespaces can be nested inside of other namespaces.
  * @param name The name of the namespace
@@ -185,6 +195,11 @@ declare module jake{
 		 * @default false
 		 */
 		async?: boolean;
+		
+		/**
+		 * number of parllel async tasks
+		*/
+		parallelLimit?: number;
 	}
 
 	/**