diff --git a/package.json b/package.json
index 049bfdb49..85e0d76b0 100644
--- a/package.json
+++ b/package.json
@@ -38,14 +38,14 @@
     "grunt-replace": "~0.7.8",
     "grunt-saucelabs": "git+https://github.com/xirzec/grunt-saucelabs.git#debug",
     "grunt-shell": "~0.7.0",
-    "grunt-ts": "^1.11.6",
+    "grunt-ts": "~3.0.0",
     "http-post": "~0.1.1",
     "less": "^1.7.4",
     "load-grunt-tasks": "^0.6.0",
     "minimist": "0.2.0",
     "qunitjs": "~1.14.0",
     "text-table": "~0.2.0",
-    "typescript": "1.0.1",
+    "typescript": "1.4.1",
     "websocket": "^1.0.8",
     "seed-random": "^2.2.0"
   },
diff --git a/tasks/options/ts.js b/tasks/options/ts.js
index 1c2f645b9..7df14b19d 100644
--- a/tasks/options/ts.js
+++ b/tasks/options/ts.js
@@ -25,7 +25,8 @@
                 sourceMap: false,
                 noImplicitAny: true,
                 declaration: false,
-                removeComments: false
+                removeComments: false,
+                suppressImplicitAnyIndexErrors: true
             }
         },
     };
diff --git a/tests/TestLib/Helper.ts b/tests/TestLib/Helper.ts
index 930ca6563..25a01e67d 100644
--- a/tests/TestLib/Helper.ts
+++ b/tests/TestLib/Helper.ts
@@ -45,19 +45,17 @@ module Helper {
 
     export function createPointerEvent(fallbackType: string) {
         // PointerEvent is already supported, so just use that
+        var e:any;
         if ((<any>window).PointerEvent) {
-            var e = document.createEvent("PointerEvent");
-            return e;
+            return document.createEvent("PointerEvent");
         } else if ((<any>window).MSPointerEvent) {
             // Fallback to the ms prefix version from IE 10
-            var e = document.createEvent("MSPointerEvent");
-            return e;
+            return document.createEvent("MSPointerEvent");
         } else if (fallbackType === "mouse") {
-            var e = document.createEvent("MouseEvent");
-            return e;
+            return document.createEvent("MouseEvent");
         } else if (fallbackType === "touch") {
-            var e = document.createEvent("MouseEvent");
-            (<any>e).isTouch = true;
+            e = document.createEvent("MouseEvent");
+            e.isTouch = true;
             return e;
         }
     }
@@ -1716,7 +1714,7 @@ module Helper {
         export function forEach(array: Array<any>, asyncCallbackFn: (value?, index?, array?) => any): WinJS.Promise<any> {
             // Execute an asynchronous forEach loop over an array. The asynchronous forEach loop only applies asyncCallbackFn to each subsequent value in the array,
             // after the Promise returned by applying asyncCallbackFn to the previous array value completes.
-            // 
+            //
             // Returns a Promise that completes when all promises that were returned by applying asyncCallbackFn to every value in the array have been completed.
             var p = WinJS.Promise.as();
             array.forEach((value, index, array) => {
diff --git a/tests/WWA-Application/application.ts b/tests/WWA-Application/application.ts
index 0e1693f31..8ed4f17b5 100644
--- a/tests/WWA-Application/application.ts
+++ b/tests/WWA-Application/application.ts
@@ -3151,7 +3151,7 @@ module CorsicaTests {
 
             // Query the system for Localized "'x' of undefined or null reference"
             var errorText = "'x' of undefined or null reference";
-            try { null.x(); }
+            try { thisVariableNotDefined.x(); }
             catch (e) {
                 errorText = e.message;
             }
@@ -3182,7 +3182,7 @@ module CorsicaTests {
                     })
                     .done(function () {
                         // next line is an intentional reference error
-                        null.x();
+                        thisVariableNotDefined.x();
                     })
 
                 LiveUnit.Assert.areEqual(0, count);