diff --git a/bootstrap.datepicker/bootstrap.datepicker.d.ts b/bootstrap.datepicker/bootstrap.datepicker.d.ts
index 41f2fcd25..8c128234c 100644
--- a/bootstrap.datepicker/bootstrap.datepicker.d.ts
+++ b/bootstrap.datepicker/bootstrap.datepicker.d.ts
@@ -5,22 +5,35 @@
 
 /// <reference path="../jquery/jquery.d.ts"/>
 
+/**
+ * See online docs: http://bootstrap-datepicker.readthedocs.org/
+ */
 interface DatepickerOptions {
     format?: string;
     weekStart?: number;
-    startDate?: any;
-    endDate?: any;
+    startDate?: Date;
+    endDate?: Date;
     autoclose?: boolean;
     startView?: number;
     todayBtn?: any;
     todayHighlight?: boolean;
     keyboardNavigation?: boolean;
     language?: string;
+    beforeShowDay?: (Date) => any;
+    calendarWeeks?: boolean;
+    clearBtn?: boolean;
+    daysOfWeekDisabled?: number[];
+    forceParse?: boolean;
+    inputs?: any[];
+    minViewMode?: any;
+    multidate?: any;
+    multidateSeparator?: string;
+    orientation?: string;
 }
 
 interface DatepickerEventObject extends JQueryEventObject {
-	date: Date;
-	format(format?: string): string;
+    date: Date;
+    format(format?: string): string;
 }
 
 interface JQuery {
@@ -29,10 +42,10 @@ interface JQuery {
     datepicker(methodName: string, params: any): JQuery;
     datepicker(options: DatepickerOptions): JQuery;
 
-	off(events: "changeDate", selector?: string, handler?: (eventObject: DatepickerEventObject) => any): JQuery;
-	off(events: "changeDate", handler: (eventObject: DatepickerEventObject) => any): JQuery;
+    off(events: "changeDate", selector?: string, handler?: (eventObject: DatepickerEventObject) => any): JQuery;
+    off(events: "changeDate", handler: (eventObject: DatepickerEventObject) => any): JQuery;
 
-	on(events: "changeDate", selector: string, data: any, handler?: (eventObject: DatepickerEventObject) => any): JQuery;
-	on(events: "changeDate", selector: string, handler: (eventObject: DatepickerEventObject) => any): JQuery;
-	on(events: 'changeDate', handler: (eventObject: DatepickerEventObject) => any): JQuery;
+    on(events: "changeDate", selector: string, data: any, handler?: (eventObject: DatepickerEventObject) => any): JQuery;
+    on(events: "changeDate", selector: string, handler: (eventObject: DatepickerEventObject) => any): JQuery;
+    on(events: 'changeDate', handler: (eventObject: DatepickerEventObject) => any): JQuery;
 }