diff --git a/applicationinsights/applicationinsights.d.ts b/applicationinsights/applicationinsights.d.ts
index 9fc6f494d..17ca4a479 100644
--- a/applicationinsights/applicationinsights.d.ts
+++ b/applicationinsights/applicationinsights.d.ts
@@ -1,7 +1,7 @@
-// Type definitions for Application Insights v0.15.7
+// Type definitions for Application Insights v0.15.12
 // Project: https://github.com/Microsoft/ApplicationInsights-node.js
 // Definitions by: Scott Southwood <https://github.com/scsouthw/>
-// Definitions: https://github.com/borisyankov/DefinitelyTyped
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 interface AutoCollectConsole {
     constructor(client: Client): AutoCollectConsole;
@@ -28,7 +28,7 @@ interface AutoCollectRequests {
 }
 
 
-declare module ContractsModule {
+declare namespace ContractsModule {
     enum DataPointType {
         Measurement = 0,
         Aggregation = 1,
@@ -338,7 +338,9 @@ interface Client {
      * @param max    the max sample for this set
      * @param stdDev the standard deviation of the set
      */
-    trackMetric(name: string, value: number, count?:number, min?: number, max?: number, stdDev?: number): void;
+    trackMetric(name: string, value: number, count?:number, min?: number, max?: number, stdDev?: number, properties?: {
+        [key: string]: string;
+    }): void;
     trackRequest(request: any /* http.ServerRequest */, response: any /* http.ServerResponse */, properties?: {
         [key: string]: string;
     }): void;
@@ -352,13 +354,13 @@ interface Client {
      * @param properties   map[string, string] - additional data used to filter events and metrics in the portal. Defaults to empty.
      * @param dependencyKind   ContractsModule.DependencyKind of this dependency. Defaults to Other.
      * @param async  True if the dependency was executed asynchronously, false otherwise. Defaults to false
-     * @param dependencySource  ContractsModule.DependencySourceType of this dependency. Defaults to Undefined. 
+     * @param dependencySource  ContractsModule.DependencySourceType of this dependency. Defaults to Undefined.
      */
     trackDependency(name: string, commandName: string, elapsedTimeMs: number, success: boolean, dependencyTypeName?: string, properties?: {}, dependencyKind?: any, async?: boolean, dependencySource?: number): void;
     /**
      * Immediately send all queued telemetry.
      */
-    sendPendingData(): void;
+    sendPendingData(callback?: (response: string) => void): void;
     getEnvelope(data: ContractsModule.Data<ContractsModule.Domain>, tagOverrides?: {
         [key: string]: string;
     }): ContractsModule.Envelope;
@@ -409,66 +411,58 @@ interface Sender {
  * The singleton meta interface for the default client of the client. This interface is used to setup/start and configure
  * the auto-collection behavior of the application insights module.
  */
-declare class ApplicationInsights {
-    static client: Client;
-    private static _isConsole;
-    private static _isExceptions;
-    private static _isPerformance;
-    private static _isRequests;
-    private static _console;
-    private static _exceptions;
-    private static _performance;
-    private static _requests;
-    private static _isStarted;
+interface ApplicationInsights {
+    client: Client;
     /**
      * Initializes a client with the given instrumentation key, if this is not specified, the value will be
      * read from the environment variable APPINSIGHTS_INSTRUMENTATIONKEY
      * @returns {ApplicationInsights/Client} a new client
      */
-    static getClient(instrumentationKey?: string): Client;
+    getClient(instrumentationKey?: string): Client;
     /**
      * Initializes the default client of the client and sets the default configuration
      * @param instrumentationKey the instrumentation key to use. Optional, if this is not specified, the value will be
      * read from the environment variable APPINSIGHTS_INSTRUMENTATIONKEY
      * @returns {ApplicationInsights} this interface
      */
-    static setup(instrumentationKey?: string): typeof ApplicationInsights;
+    setup(instrumentationKey?: string): ApplicationInsights;
     /**
      * Starts automatic collection of telemetry. Prior to calling start no telemetry will be collected
      * @returns {ApplicationInsights} this interface
      */
-    static start(): typeof ApplicationInsights;
+    start(): ApplicationInsights;
     /**
      * Sets the state of console tracking (enabled by default)
      * @param value if true console activity will be sent to Application Insights
      * @returns {ApplicationInsights} this interface
      */
-    static setAutoCollectConsole(value: boolean): typeof ApplicationInsights;
+    setAutoCollectConsole(value: boolean): ApplicationInsights;
     /**
      * Sets the state of exception tracking (enabled by default)
      * @param value if true uncaught exceptions will be sent to Application Insights
      * @returns {ApplicationInsights} this interface
      */
-    static setAutoCollectExceptions(value: boolean): typeof ApplicationInsights;
+    setAutoCollectExceptions(value: boolean): ApplicationInsights;
     /**
      * Sets the state of performance tracking (enabled by default)
      * @param value if true performance counters will be collected every second and sent to Application Insights
      * @returns {ApplicationInsights} this interface
      */
-    static setAutoCollectPerformance(value: boolean): typeof ApplicationInsights;
+    setAutoCollectPerformance(value: boolean): ApplicationInsights;
     /**
      * Sets the state of request tracking (enabled by default)
      * @param value if true requests will be sent to Application Insights
      * @returns {ApplicationInsights} this interface
      */
-    static setAutoCollectRequests(value: boolean): typeof ApplicationInsights;
+    setAutoCollectRequests(value: boolean): ApplicationInsights;
     /**
      * Enables verbose debug logging
      * @returns {ApplicationInsights} this interface
      */
-    static enableVerboseLogging(): typeof ApplicationInsights;
+    enableVerboseLogging(): ApplicationInsights;
 }
 
 declare module "applicationinsights" {
-    export = ApplicationInsights;
-}
\ No newline at end of file
+    const applicationinsights: ApplicationInsights;
+    export = applicationinsights;
+}