diff --git a/common/changes/@uifabric/example-app-base/strict-typescript_2017-06-10-01-29.json b/common/changes/@uifabric/example-app-base/strict-typescript_2017-06-10-01-29.json
new file mode 100644
index 00000000000000..6336d0ba5a7799
--- /dev/null
+++ b/common/changes/@uifabric/example-app-base/strict-typescript_2017-06-10-01-29.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/example-app-base",
+      "comment": "Enable no implicit any in utilities package",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/example-app-base",
+  "email": "christianjordangonzalez@gmail.com"
+}
\ No newline at end of file
diff --git a/common/changes/@uifabric/fabric-website/strict-typescript_2017-06-10-01-29.json b/common/changes/@uifabric/fabric-website/strict-typescript_2017-06-10-01-29.json
new file mode 100644
index 00000000000000..3f948499b4b8f4
--- /dev/null
+++ b/common/changes/@uifabric/fabric-website/strict-typescript_2017-06-10-01-29.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/fabric-website",
+      "comment": "Enable no implicit any in utilities package",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/fabric-website",
+  "email": "christianjordangonzalez@gmail.com"
+}
\ No newline at end of file
diff --git a/common/changes/@uifabric/styling/strict-typescript_2017-06-10-01-29.json b/common/changes/@uifabric/styling/strict-typescript_2017-06-10-01-29.json
new file mode 100644
index 00000000000000..4810bcc1454127
--- /dev/null
+++ b/common/changes/@uifabric/styling/strict-typescript_2017-06-10-01-29.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/styling",
+      "comment": "Enable no implicit any in utilities package",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/styling",
+  "email": "christianjordangonzalez@gmail.com"
+}
\ No newline at end of file
diff --git a/common/changes/@uifabric/utilities/strict-typescript_2017-06-10-01-29.json b/common/changes/@uifabric/utilities/strict-typescript_2017-06-10-01-29.json
new file mode 100644
index 00000000000000..a66076080ab1e6
--- /dev/null
+++ b/common/changes/@uifabric/utilities/strict-typescript_2017-06-10-01-29.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/utilities",
+      "comment": "Enable no implicit any in utilities package",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@uifabric/utilities",
+  "email": "christianjordangonzalez@gmail.com"
+}
\ No newline at end of file
diff --git a/common/changes/office-ui-fabric-react/strict-typescript_2017-06-10-01-29.json b/common/changes/office-ui-fabric-react/strict-typescript_2017-06-10-01-29.json
new file mode 100644
index 00000000000000..d1c1e8b159f196
--- /dev/null
+++ b/common/changes/office-ui-fabric-react/strict-typescript_2017-06-10-01-29.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "office-ui-fabric-react",
+      "comment": "Enable no implicit any in utilities package",
+      "type": "patch"
+    }
+  ],
+  "packageName": "office-ui-fabric-react",
+  "email": "christianjordangonzalez@gmail.com"
+}
\ No newline at end of file
diff --git a/common/config/rush/npm-shrinkwrap.json b/common/config/rush/npm-shrinkwrap.json
index 78f0e535d0514b..bf17555b905bfa 100644
--- a/common/config/rush/npm-shrinkwrap.json
+++ b/common/config/rush/npm-shrinkwrap.json
@@ -1415,6 +1415,11 @@
       "resolved": "https://registry.npmjs.org/@types/es6-promise/-/es6-promise-0.0.32.tgz",
       "integrity": "sha1-O89E+x5Cnz33YYjIxth0Rjujcf0="
     },
+    "@types/es6-weak-map": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@types/es6-weak-map/-/es6-weak-map-1.2.0.tgz",
+      "integrity": "sha1-2fb4WDaaiLvGnvQCOAgfLWu8hhQ="
+    },
     "@types/express": {
       "version": "4.0.35",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-4.0.35.tgz",
diff --git a/packages/utilities/api/utilities.api.ts b/packages/utilities/api/utilities.api.ts
index 7780172e49b960..9565f97f7ff087 100644
--- a/packages/utilities/api/utilities.api.ts
+++ b/packages/utilities/api/utilities.api.ts
@@ -1,3 +1,5 @@
+export function assign(target: any, ...args: any[]): any;
+
 // WARNING: dispose has incomplete type information
 // WARNING: clearImmediate has incomplete type information
 // WARNING: clearInterval has incomplete type information
@@ -50,10 +52,11 @@ class BaseComponent<P extends IBaseProps, S> extends React.Component<P, S> {
 
 // WARNING: contextTypes has incomplete type information
 // WARNING: childContextTypes has incomplete type information
-// WARNING: __constructor has incomplete type information
 // WARNING: componentWillReceiveProps has incomplete type information
 // WARNING: render has incomplete type information
 class Customizer extends BaseComponent<ICustomizerProps, ICustomizerState> {
+  // (undocumented)
+  constructor(props: any, context: any);
   public static addChangeListener(onChanged: IChangeListener): void;
   // (undocumented)
   public getChildContext(): any;
@@ -150,6 +153,8 @@ export function hasOverflow(element: HTMLElement): boolean;
 
 export function hasVerticalOverflow(element: HTMLElement): boolean;
 
+export function hoistMethods(destination: any, source: any, exclusions: string[] = REACT_LIFECYCLE_EXCLUSIONS): string[];
+
 // (undocumented)
 interface IBaseProps {
   // (undocumented)
@@ -374,10 +379,8 @@ export function warnMutuallyExclusive < P >(componentName: string,
 // WARNING: getWindow has incomplete type information
 // WARNING: getDocument has incomplete type information
 // WARNING: doesElementContainFocus has incomplete type information
-// WARNING: hoistMethods has incomplete type information
 // WARNING: setLanguage has incomplete type information
 // WARNING: shallowCompare has incomplete type information
-// WARNING: assign has incomplete type information
 // WARNING: filteredAssign has incomplete type information
 // WARNING: Unsupported export: baseElementEvents
 // WARNING: Unsupported export: baseElementProperties
diff --git a/packages/utilities/package.json b/packages/utilities/package.json
index aa1ff5d323cbc6..c879c12efc2afa 100644
--- a/packages/utilities/package.json
+++ b/packages/utilities/package.json
@@ -20,6 +20,7 @@
     "@types/chai": "^3.4.35",
     "@types/enzyme": "^2.7.5",
     "@types/es6-promise": "^0.0.32",
+    "@types/es6-weak-map": "1.2.0",
     "@types/mocha": "^2.2.39",
     "@types/prop-types": "^15.5.1",
     "@types/react": "^15.0.25",
diff --git a/packages/utilities/src/Async.ts b/packages/utilities/src/Async.ts
index 16701ed41a85a7..d9d065a181a9b5 100644
--- a/packages/utilities/src/Async.ts
+++ b/packages/utilities/src/Async.ts
@@ -10,9 +10,9 @@ declare function setTimeout(cb: Function, delay: number): number;
 declare function setInterval(cb: Function, delay: number): number;
 
 export class Async {
-  private _timeoutIds = null;
-  private _immediateIds = null;
-  private _intervalIds = null;
+  private _timeoutIds: any = null;
+  private _immediateIds: any = null;
+  private _intervalIds: any = null;
   private _animationFrameIds: { [id: number]: boolean } = null;
   private _isDisposed = false;
   private _parent: any;
@@ -38,7 +38,7 @@ export class Async {
     if (this._timeoutIds) {
       for (id in this._timeoutIds) {
         if (this._timeoutIds.hasOwnProperty(id)) {
-          this.clearTimeout(id);
+          this.clearTimeout(parseInt(id, 10));
         }
       }
 
@@ -49,7 +49,7 @@ export class Async {
     if (this._immediateIds) {
       for (id in this._immediateIds) {
         if (this._immediateIds.hasOwnProperty(id)) {
-          this.clearImmediate(id);
+          this.clearImmediate(parseInt(id, 10));
         }
       }
 
@@ -60,7 +60,7 @@ export class Async {
     if (this._intervalIds) {
       for (id in this._intervalIds) {
         if (this._intervalIds.hasOwnProperty(id)) {
-          this.clearInterval(id);
+          this.clearInterval(parseInt(id, 10));
         }
       }
       this._intervalIds = null;
@@ -70,7 +70,7 @@ export class Async {
     if (this._animationFrameIds) {
       for (id in this._animationFrameIds) {
         if (this._animationFrameIds.hasOwnProperty(id)) {
-          this.cancelAnimationFrame(id);
+          this.cancelAnimationFrame(parseInt(id, 10));
         }
       }
 
@@ -254,7 +254,7 @@ export class Async {
     let leading = true;
     let trailing = true;
     let lastExecuteTime = 0;
-    let lastResult;
+    let lastResult: any;
     let lastArgs: any[];
     let timeoutId: number = null;
 
@@ -320,10 +320,10 @@ export class Async {
     let waitMS = wait || 0;
     let leading = false;
     let trailing = true;
-    let maxWait = null;
+    let maxWait: any = null;
     let lastCallTime = 0;
     let lastExecuteTime = (new Date).getTime();
-    let lastResult;
+    let lastResult: any;
     let lastArgs: any[];
     let timeoutId: number = null;
 
diff --git a/packages/utilities/src/BaseComponent.test.tsx b/packages/utilities/src/BaseComponent.test.tsx
index a2f13026430c25..3301e49b86e00e 100644
--- a/packages/utilities/src/BaseComponent.test.tsx
+++ b/packages/utilities/src/BaseComponent.test.tsx
@@ -85,7 +85,7 @@ describe('BaseComponent', () => {
   });
 });
 
-function _buildTestFor(methodName) {
+function _buildTestFor(methodName: string) {
   it(`calls the error logger on ${methodName} exception`, () => {
     let lastErrorMessage = null;
 
@@ -93,7 +93,7 @@ function _buildTestFor(methodName) {
 
     let c = new TestComponent();
 
-    c[methodName]();
+    (c as any)[methodName]();
 
     assert(lastErrorMessage !== null, 'Error callback not called');
   });
diff --git a/packages/utilities/src/BaseComponent.ts b/packages/utilities/src/BaseComponent.ts
index f9a70fdd0f64f7..6054348f953ee4 100644
--- a/packages/utilities/src/BaseComponent.ts
+++ b/packages/utilities/src/BaseComponent.ts
@@ -146,7 +146,7 @@ export class BaseComponent<P extends IBaseProps, S> extends React.Component<P, S
     }
     if (!this.__resolves[refName]) {
       this.__resolves[refName] = (ref) => {
-        return this[refName] = ref;
+        return (this as any)[refName] = ref;
       };
     }
 
@@ -202,11 +202,11 @@ function _makeAllSafe(obj: BaseComponent<any, any>, prototype: Object, methodNam
 }
 
 function _makeSafe(obj: BaseComponent<any, any>, prototype: Object, methodName: string) {
-  let classMethod = obj[methodName];
-  let prototypeMethod = prototype[methodName];
+  let classMethod = (obj as any)[methodName];
+  let prototypeMethod = (prototype as any)[methodName];
 
   if (classMethod || prototypeMethod) {
-    obj[methodName] = function () {
+    (obj as any)[methodName] = function () {
       let retVal;
 
       try {
diff --git a/packages/utilities/src/Customizer.tsx b/packages/utilities/src/Customizer.tsx
index d7b576f3bb161e..e778b3feaa8452 100644
--- a/packages/utilities/src/Customizer.tsx
+++ b/packages/utilities/src/Customizer.tsx
@@ -77,7 +77,7 @@ export class Customizer extends BaseComponent<ICustomizerProps, ICustomizerState
     }
   }
 
-  constructor(props, context) {
+  constructor(props: any, context: any) {
     super(props);
 
     this.state = this._getInjectedProps(props, context);
@@ -87,7 +87,7 @@ export class Customizer extends BaseComponent<ICustomizerProps, ICustomizerState
     return this.state;
   }
 
-  public componentWillReceiveProps(newProps, newContext) {
+  public componentWillReceiveProps(newProps: any, newContext: any) {
     this.setState(this._getInjectedProps(newProps, newContext));
   }
 
diff --git a/packages/utilities/src/DelayedRender.tsx b/packages/utilities/src/DelayedRender.tsx
index 3405a57bcf6131..f586fb172c0472 100644
--- a/packages/utilities/src/DelayedRender.tsx
+++ b/packages/utilities/src/DelayedRender.tsx
@@ -24,7 +24,7 @@ export class DelayedRender extends React.Component<IDelayedRenderProps, IDelayed
     delay: 0
   };
 
-  private _timeoutId;
+  private _timeoutId: number | undefined;
 
   constructor(props: IDelayedRenderProps) {
     super(props);
diff --git a/packages/utilities/src/EventGroup.ts b/packages/utilities/src/EventGroup.ts
index b0d609fb819669..d24127b8d7e5af 100644
--- a/packages/utilities/src/EventGroup.ts
+++ b/packages/utilities/src/EventGroup.ts
@@ -33,7 +33,7 @@ export interface IDeclaredEventsByName {
  */
 export class EventGroup {
   private static _uniqueId = 0;
-  private _parent;
+  private _parent: any;
   private _eventRecords: IEventRecord[];
   private _id = EventGroup._uniqueId++;
   private _isDisposed: boolean;
@@ -56,10 +56,10 @@ export class EventGroup {
         let ev = document.createEvent('HTMLEvents');
 
         ev.initEvent(eventName, bubbleEvent, true);
-        ev['args'] = eventArgs;
+        (ev as any)['args'] = eventArgs;
         retVal = target.dispatchEvent(ev);
-      } else if (document['createEventObject']) { // IE8
-        let evObj = document['createEventObject'](eventArgs);
+      } else if ((document as any)['createEventObject']) { // IE8
+        let evObj = (document as any)['createEventObject'](eventArgs);
         // cannot set cancelBubble on evObj, fireEvent will overwrite it
         target.fireEvent('on' + eventName, evObj);
       }
diff --git a/packages/utilities/src/autobind.ts b/packages/utilities/src/autobind.ts
index b9f01cb22fd7c9..bca1666cb0b23c 100644
--- a/packages/utilities/src/autobind.ts
+++ b/packages/utilities/src/autobind.ts
@@ -30,7 +30,7 @@ export function autobind<T extends Function>(target: any, key: string, descripto
       return fnBound;
     },
 
-    set(newValue) {
+    set(newValue: any) {
       Object.defineProperty(this, key, {
         configurable: true,
         writable: true,
diff --git a/packages/utilities/src/css.ts b/packages/utilities/src/css.ts
index 006cf4fddebfed..e16c39e8d1e071 100644
--- a/packages/utilities/src/css.ts
+++ b/packages/utilities/src/css.ts
@@ -20,7 +20,7 @@ export function css(...args: ICssInput[]) {
         classes.push(arg.toString());
       } else {
         for (let key in arg as any) {
-          if (arg[key]) {
+          if ((arg as any)[key]) {
             classes.push(key);
           }
         }
diff --git a/packages/utilities/src/customizable.test.tsx b/packages/utilities/src/customizable.test.tsx
index 41454c8afed01c..8ef656a1e5a5c2 100644
--- a/packages/utilities/src/customizable.test.tsx
+++ b/packages/utilities/src/customizable.test.tsx
@@ -10,7 +10,7 @@ class Foo extends React.Component<{ field: string; }, {}> {
   public name: any;
 
   public render() {
-    return <div>{ this.props[this.props.field] }</div>;
+    return <div>{ (this.props as any)[this.props.field] }</div>;
   }
 }
 
diff --git a/packages/utilities/src/customizable.tsx b/packages/utilities/src/customizable.tsx
index 6b5400a9a6e4c6..a590468340c1a3 100644
--- a/packages/utilities/src/customizable.tsx
+++ b/packages/utilities/src/customizable.tsx
@@ -29,7 +29,7 @@ export function customizable<P>(fields: string[]) {
         let defaultProps = {};
 
         for (let propName of fields) {
-          defaultProps[propName] = (this.context.injectedProps) ?
+          (defaultProps as any)[propName] = (this.context.injectedProps) ?
             this.context.injectedProps[propName] :
             Customizer.getDefault(propName);
         }
diff --git a/packages/utilities/src/dom.ts b/packages/utilities/src/dom.ts
index b114db5c24f72e..1f3ac4740abe68 100644
--- a/packages/utilities/src/dom.ts
+++ b/packages/utilities/src/dom.ts
@@ -106,7 +106,7 @@ let _isSSR = false;
 /**
  * Helper to set ssr mode to simulate no window object returned from getWindow helper.
  */
-export function setSSR(isEnabled) {
+export function setSSR(isEnabled: boolean) {
   _isSSR = isEnabled;
 }
 
diff --git a/packages/utilities/src/focus.test.tsx b/packages/utilities/src/focus.test.tsx
index d04874f42b4058..3d60e27f071901 100644
--- a/packages/utilities/src/focus.test.tsx
+++ b/packages/utilities/src/focus.test.tsx
@@ -8,9 +8,9 @@ let { expect } = chai;
 
 import { isElementVisible, isElementTabbable } from './focus';
 
-let _hiddenElement;
-let _visibleElement;
-let _element;
+let _hiddenElement: HTMLElement | undefined;
+let _visibleElement: HTMLElement | undefined;
+let _element: HTMLElement | undefined;
 
 function renderIntoDocument(element: React.ReactElement<any>): HTMLElement {
   const component = ReactTestUtils.renderIntoDocument(element);
diff --git a/packages/utilities/src/hoist.ts b/packages/utilities/src/hoist.ts
index bdd468fc55e94a..9724aee142783d 100644
--- a/packages/utilities/src/hoist.ts
+++ b/packages/utilities/src/hoist.ts
@@ -18,7 +18,7 @@ const REACT_LIFECYCLE_EXCLUSIONS = [
  * @param exclusions - (Optional) What methods to exclude from being hoisted.
  * @returns An array of names of methods that were hoisted.
  */
-export function hoistMethods(destination, source, exclusions: string[] = REACT_LIFECYCLE_EXCLUSIONS): string[] {
+export function hoistMethods(destination: any, source: any, exclusions: string[] = REACT_LIFECYCLE_EXCLUSIONS): string[] {
   let hoisted: string[] = [];
   for (let methodName in source) {
     if (
diff --git a/packages/utilities/src/memoize.test.ts b/packages/utilities/src/memoize.test.ts
index 7b1fe5e8518a93..b100ae39bf5263 100644
--- a/packages/utilities/src/memoize.test.ts
+++ b/packages/utilities/src/memoize.test.ts
@@ -1,10 +1,10 @@
 import { memoize, memoizeFunction, setMemoizeWeakMap } from './memoize';
-import * as weakMapPolyfill from 'es6-weak-map/polyfill';
+import weakMapPolyfill = require('es6-weak-map');
 
 let { expect } = chai;
 
 describe('memoizeFunction', () => {
-  before(()=> {
+  before(() => {
     setMemoizeWeakMap(weakMapPolyfill);
   });
 
@@ -95,7 +95,7 @@ describe('memoizeFunction', () => {
 });
 
 describe('memoize', () => {
-  before(()=> {
+  before(() => {
     setMemoizeWeakMap(weakMapPolyfill);
   });
 
diff --git a/packages/utilities/src/memoize.ts b/packages/utilities/src/memoize.ts
index 3205cdbb690668..8353f85cccc248 100644
--- a/packages/utilities/src/memoize.ts
+++ b/packages/utilities/src/memoize.ts
@@ -1,11 +1,11 @@
 declare class WeakMap {
   public get(key: any): any;
   public set(key: any, value: any): void;
-  public has(key: any);
+  public has(key: any): boolean;
 }
 
 const _emptyObject = { empty: true };
-const _dictionary = {};
+const _dictionary: any = {};
 let _weakMap = (typeof WeakMap === 'undefined') ? null : WeakMap;
 
 interface IMemoizeNode {
diff --git a/packages/utilities/src/object.ts b/packages/utilities/src/object.ts
index 400d75ee2767fc..339700c34969fe 100644
--- a/packages/utilities/src/object.ts
+++ b/packages/utilities/src/object.ts
@@ -9,7 +9,7 @@ if (_global[CURRENT_ID_PROPERTY] === undefined) {
   _global[CURRENT_ID_PROPERTY] = 0;
 }
 
-function checkProperties(a, b) {
+function checkProperties(a: any, b: any) {
   for (let propName in a) {
     if (a.hasOwnProperty(propName)) {
       if (!b.hasOwnProperty(propName) || (b[propName] !== a[propName])) {
@@ -22,7 +22,7 @@ function checkProperties(a, b) {
 }
 
 // Compare a to b and b to a
-export function shallowCompare(a, b) {
+export function shallowCompare(a: any, b: any) {
   return checkProperties(a, b) && checkProperties(b, a);
 }
 
@@ -35,7 +35,7 @@ export function shallowCompare(a, b) {
  * @param args - One or more objects that will be mixed into the target in the order they are provided.
  * @returns Resulting merged target.
  */
-export function assign(target: any, ...args): any {
+export function assign(target: any, ...args: any[]): any {
   return filteredAssign.apply(this, [null, target].concat(args));
 }
 
@@ -50,7 +50,7 @@ export function assign(target: any, ...args): any {
  * @param args - One or more objects that will be mixed into the target in the order they are provided.
  * @returns Resulting merged target.
  */
-export function filteredAssign(isAllowed: (propName: string) => boolean, target: any, ...args) {
+export function filteredAssign(isAllowed: (propName: string) => boolean, target: any, ...args: any[]) {
   target = target || {};
 
   for (let sourceObject of args) {
diff --git a/packages/utilities/src/properties.test.ts b/packages/utilities/src/properties.test.ts
index d3aa465be5b5be..b3b8621cdceed9 100644
--- a/packages/utilities/src/properties.test.ts
+++ b/packages/utilities/src/properties.test.ts
@@ -11,14 +11,14 @@ describe('getNativeProps', () => {
     let result = getNativeProps<React.HTMLAttributes<HTMLDivElement>>({
       'data-automation-id': 1
     }, divProperties);
-    expect(result['data-automation-id']).equals(1);
+    expect((result as any)['data-automation-id']).equals(1);
   });
 
   it('can pass through aria tags', () => {
     let result = getNativeProps<React.HTMLAttributes<HTMLDivElement>>({
       'aria-label': 1
     }, divProperties);
-    expect(result['aria-label']).equals(1);
+    expect((result as any)['aria-label']).equals(1);
   });
 
   it('can pass through basic div properties and events', () => {
@@ -29,7 +29,8 @@ describe('getNativeProps', () => {
     }, divProperties);
     expect(result.className).equals('foo');
     expect(result.onClick).is.instanceof(Function, 'onClick not function');
-    expect(result['onClickCapture']).is.instanceof(Function, 'onClickCapture not function');  // tslint:disable-line:no-string-literal
+    // tslint:disable-next-line:no-string-literal
+    expect((result as any)['onClickCapture']).is.instanceof(Function, 'onClickCapture not function');
   });
 
   it('can remove unexpected properties', () => {
@@ -38,11 +39,11 @@ describe('getNativeProps', () => {
       className: 'hi'
     }, divProperties);
     expect(result.className).equals('hi');
-    expect(result['foobar']).equals(undefined); // tslint:disable-line:no-string-literal
+    expect((result as any)['foobar']).equals(undefined); // tslint:disable-line:no-string-literal
   });
 
   it('can exclude properties', () => {
-    let result = getNativeProps<any>({ a: 1, b: 2}, ['a', 'b'], ['b']);
+    let result = getNativeProps<any>({ a: 1, b: 2 }, ['a', 'b'], ['b']);
 
     expect(result.a).to.exist;
     expect(result.b).to.not.exist;
diff --git a/packages/utilities/src/resources.ts b/packages/utilities/src/resources.ts
index 7db0806d03cc9b..f1aedeee24a453 100644
--- a/packages/utilities/src/resources.ts
+++ b/packages/utilities/src/resources.ts
@@ -1,11 +1,11 @@
 let _baseUrl = '';
 
 /** Sets the current base url used for fetching images. */
-export function getResourceUrl(url) {
+export function getResourceUrl(url: string) {
   return _baseUrl + url;
 }
 
 /** Gets the current base url used for fetching images. */
-export function setBaseUrl(baseUrl) {
+export function setBaseUrl(baseUrl: string) {
   _baseUrl = baseUrl;
 }
diff --git a/packages/utilities/src/string.ts b/packages/utilities/src/string.ts
index ca0b126d8a8f57..0de594d55bdfc4 100644
--- a/packages/utilities/src/string.ts
+++ b/packages/utilities/src/string.ts
@@ -11,20 +11,20 @@ const FORMAT_REGEX = /\{\d+\}/g;
  * Example "I love {0} every {1}".format("CXP") will result in a Debug Exception.
  */
 export function format(s: string, ...values: any[]): string {
-    'use strict';
+  'use strict';
 
-    let args = values;
-    // Callback match function
-    function replace_func(match: string) {
-        // looks up in the args
-        let replacement = args[match.replace(FORMAT_ARGS_REGEX, '')];
+  let args = values;
+  // Callback match function
+  function replace_func(match: string) {
+    // looks up in the args
+    let replacement = args[match.replace(FORMAT_ARGS_REGEX, '') as any];
 
-        // catches undefined in nondebug and null in debug and nondebug
-        if (replacement === null || replacement === undefined) {
-            replacement = '';
-        }
-
-        return replacement;
+    // catches undefined in nondebug and null in debug and nondebug
+    if (replacement === null || replacement === undefined) {
+      replacement = '';
     }
-    return (s.replace(FORMAT_REGEX, replace_func));
+
+    return replacement;
+  }
+  return (s.replace(FORMAT_REGEX, replace_func));
 }
\ No newline at end of file
diff --git a/packages/utilities/src/test/injectWrapperMethod.ts b/packages/utilities/src/test/injectWrapperMethod.ts
index 72fb2118276b29..b683b2cf1445e2 100644
--- a/packages/utilities/src/test/injectWrapperMethod.ts
+++ b/packages/utilities/src/test/injectWrapperMethod.ts
@@ -7,13 +7,13 @@ import { ReactWrapper } from 'enzyme';
  * @param fn - The function to run prior to the call of the original method
  */
 export function injectWrapperMethod(wrapper: ReactWrapper<any, any>, methodName: string, fn: () => void) {
-  const originalMethod = wrapper.instance()[methodName];
+  const originalMethod = (wrapper.instance() as any)[methodName];
 
   if (typeof originalMethod !== 'function') {
     throw new Error(`Tried to override the method ${methodName} on a ReactWrapper that does not have that function`);
   }
 
-  wrapper.instance()[methodName] = function (prevProps: any) {
+  (wrapper.instance() as any)[methodName] = function (prevProps: any) {
     fn();
     originalMethod.call(this, prevProps);
   };
diff --git a/packages/utilities/tsconfig.json b/packages/utilities/tsconfig.json
index df37502ab300d2..c86ca82c9d7db2 100644
--- a/packages/utilities/tsconfig.json
+++ b/packages/utilities/tsconfig.json
@@ -11,6 +11,7 @@
     "sourceMap": true,
     "experimentalDecorators": true,
     "importHelpers": true,
+    "noImplicitAny": true,
     "moduleResolution": "node",
     "types": [
       "chai",