diff --git a/README.md b/README.md
index a27d4ed..87f461f 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,24 @@ describe('tests with webdriver', function() {
 })
 ```
 
+TypeScript
+----------
+
+For the typings related to the changes in the global jasmine variables (e.g.
+allowing `it()` blocks to return a promise), we publish the package
+`@types/jasminewd2`.  If you are writing tests using jasminewd (including
+Protractor tests), be sure to include `@types/jasminewd2` in your
+`devDependencies`, as these global type modifications are ***not*** bundled with
+the `jasminewd2` npm module.
+
+jasminewd also exports one function directly: `init`.  Unfortunately, we do not
+publish typings for this function.  If you call this function directly (e.g. you
+are a Protractor dev), you should simply do:
+
+```ts
+require('jasminewd2').init(controlFlow);
+```
+
 `async` functions / `await`
 ---------------------------
 
diff --git a/package.json b/package.json
index 79c7bc3..d6ed1a1 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "selenium-webdriver": "3.0.1"
   },
   "devDependencies": {
+    "@types/jasmine": "^2.5.40",
     "@types/node": "^6.0.56",
     "@types/selenium-webdriver": "^2.53.38",
     "jasmine": "2.4.1",
diff --git a/spec/@types_jasminewd2.d.ts b/spec/@types_jasminewd2.d.ts
new file mode 100644
index 0000000..dc584b6
--- /dev/null
+++ b/spec/@types_jasminewd2.d.ts
@@ -0,0 +1,73 @@
+// This is jasminewd's internal version of @types/jasminewd2.  If you need types
+// for jasminewd2, please use @types/jasminewd2 instead
+
+// Type definitions for jasminewd2
+// Project https://github.com/angular/jasminewd
+// Definitions by: Sammy Jelin <https://github.com/sjelin>
+
+declare function it(expectation: string, assertion?: () => Promise<void>, timeout?: number): void;
+declare function fit(expectation: string, assertion?: () => Promise<void>, timeout?: number): void;
+declare function xit(expectation: string, assertion?: () => Promise<void>, timeout?: number): void;
+declare function beforeEach(action: () => Promise<void>, timeout?: number): void;
+declare function afterEach(action: () => Promise<void>, timeout?: number): void;
+declare function beforeAll(action: () => Promise<void>, timeout?: number): void;
+declare function afterAll(action: () => Promise<void>, timeout?: number): void;
+
+declare namespace jasmine {
+  // The global `Promise` type is too strict and kinda wrong
+  interface Promise<T> {
+      then<U>(onFulfill?: (value: T) => U | Promise<U>, onReject?: (error: any) => U | Promise<U>): Promise<U>;
+  }
+
+  interface Matchers {
+    toBe(expected: any, expectationFailOutput?: any): Promise<void>;
+    toEqual(expected: any, expectationFailOutput?: any): Promise<void>;
+    toMatch(expected: string | RegExp | Promise<string | RegExp>, expectationFailOutput?: any): Promise<void>;
+    toBeDefined(expectationFailOutput?: any): Promise<void>;
+    toBeUndefined(expectationFailOutput?: any): Promise<void>;
+    toBeNull(expectationFailOutput?: any): Promise<void>;
+    toBeNaN(): Promise<void>;
+    toBeTruthy(expectationFailOutput?: any): Promise<void>;
+    toBeFalsy(expectationFailOutput?: any): Promise<void>;
+    toHaveBeenCalled(): Promise<void>;
+    toHaveBeenCalledWith(...params: any[]): Promise<void>;
+    toHaveBeenCalledTimes(expected: number | Promise<number>): Promise<void>;
+    toContain(expected: any, expectationFailOutput?: any): Promise<void>;
+    toBeLessThan(expected: number | Promise<number>, expectationFailOutput?: any): Promise<void>;
+    toBeLessThanOrEqual(expected: number | Promise<number>, expectationFailOutput?: any): Promise<void>;
+    toBeGreaterThan(expected: number | Promise<number>, expectationFailOutput?: any): Promise<void>;
+    toBeGreaterThanOrEqual(expected: number | Promise<number>, expectationFailOutput?: any): Promise<void>;
+    toBeCloseTo(expected: number | Promise<number>, precision?: any, expectationFailOutput?: any): Promise<void>;
+    toThrow(expected?: any): Promise<void>;
+    toThrowError(message?: string | RegExp | Promise<string | RegExp>): Promise<void>;
+    toThrowError(expected?: new (...args: any[]) => Error | Promise<new (...args: any[]) => Error>, message?: string | RegExp | Promise<string | RegExp>): Promise<void>;
+  }
+
+  function addMatchers(matchers: AsyncCustomMatcherFactories): void;
+
+  interface Env {
+    addMatchers(matchers: AsyncCustomMatcherFactories): void;
+  }
+
+  interface Spec {
+    addMatchers(matchers: AsyncCustomMatcherFactories): void;
+  }
+
+  interface AsyncCustomMatcherFactories {
+    [index: string]: AsyncCustomMatcherFactory;
+  }
+
+  interface AsyncCustomMatcherFactory {
+      (util: MatchersUtil, customEqualityTesters: Array<CustomEqualityTester>): AsyncCustomMatcher;
+  }
+
+  interface AsyncCustomMatcher {
+      compare<T>(actual: T, expected: T): AsyncCustomMatcherResult;
+      compare(actual: any, expected: any): AsyncCustomMatcherResult;
+  }
+
+  interface AsyncCustomMatcherResult {
+    pass: boolean | Promise<boolean>;
+    message?: string;
+  }
+}
diff --git a/spec/asyncAwaitAdapterSpec.ts b/spec/asyncAwaitAdapterSpec.ts
index 6c095c8..54f177f 100644
--- a/spec/asyncAwaitAdapterSpec.ts
+++ b/spec/asyncAwaitAdapterSpec.ts
@@ -1,15 +1,5 @@
 import {promise as wdpromise, WebElement} from 'selenium-webdriver';
-const common = require('./common');
-
-declare function expect(actual: any): any;
-declare function describe(description: string, tests: Function): void;
-declare function it(description: string, test?: Function, timeout?: number): any;
-declare function xit(description: string, test?: Function, timeout?: number): any;
-declare function beforeEach(setup: Function): void;
-declare function beforeAll(setup: Function): void;
-declare function afterEach(setup: Function): void;
-declare function afterAll(setup: Function): void;
-declare var jasmine;
+import {getFakeDriver, getMatchers} from './common.js';
 
 /**
  * This file is very similar to adapterSpec.ts, but we use async/await instead
@@ -17,7 +7,7 @@ declare var jasmine;
  * to work regardless of if the WebDriver Control Flow is disabled.
  */
 
-const fakeDriver = common.getFakeDriver();
+const fakeDriver = getFakeDriver();
 
 /* jshint esversion: 6 */
 describe('webdriverJS Jasmine adapter plain', function() {
@@ -54,7 +44,7 @@ describe('webdriverJS Jasmine adapter', function() {
   let beforeEachMsg: string;
 
   beforeEach(function() {
-    jasmine.addMatchers(common.getMatchers());
+    jasmine.addMatchers(getMatchers());
   });
 
   beforeEach(async function() {
diff --git a/spec/asyncAwaitErrorSpec.ts b/spec/asyncAwaitErrorSpec.ts
index 3a70155..37adebc 100644
--- a/spec/asyncAwaitErrorSpec.ts
+++ b/spec/asyncAwaitErrorSpec.ts
@@ -1,14 +1,4 @@
-const common = require('./common');
-
-declare function expect(actual: any): any;
-declare function describe(description: string, tests: Function): void;
-declare function it(description: string, test?: Function, timeout?: number): any;
-declare function xit(description: string, test?: Function, timeout?: number): any;
-declare function beforeEach(setup: Function): void;
-declare function beforeAll(setup: Function): void;
-declare function afterEach(setup: Function): void;
-declare function afterAll(setup: Function): void;
-declare var jasmine;
+import {getFakeDriver, getMatchers} from './common.js';
 
 /**
  * This file is very similar to errorSpec.ts, but we use async/await instead of
@@ -16,7 +6,7 @@ declare var jasmine;
  * work regardless of if the WebDriver Control Flow is disabled.
  */
 
-const fakeDriver = common.getFakeDriver();
+const fakeDriver = getFakeDriver();
 
 /* jshint esversion: 6 */
 describe('Timeout cases', function() {
@@ -38,7 +28,7 @@ describe('Timeout cases', function() {
 
 describe('things that should fail', function() {
   beforeEach(function() {
-    jasmine.addMatchers(common.getMatchers());
+    jasmine.addMatchers(getMatchers());
   });
 
   it('should pass errors from done callback', function(done) {
diff --git a/spec/common.js b/spec/common.ts
similarity index 51%
rename from spec/common.js
rename to spec/common.ts
index 4ab4964..45640c2 100644
--- a/spec/common.js
+++ b/spec/common.ts
@@ -1,110 +1,110 @@
-var webdriver = require('selenium-webdriver');
+import {promise as wdpromise, WebElement} from 'selenium-webdriver';
 
-var flow = webdriver.promise.controlFlow();
+const flow = wdpromise.controlFlow();
 require('../index.js').init(flow);
 
-exports.getFakeDriver = function() {
+export function getFakeDriver() {
   return {
     controlFlow: function() {
       return flow;
     },
-    sleep: function(ms) {
+    sleep: function(ms: number) {
       return flow.timeout(ms);
     },
     setUp: function() {
       return flow.execute(function() {
-        return webdriver.promise.when('setup done');
+        return wdpromise.when('setup done');
       }, 'setUp');
     },
     getValueA: function() {
       return flow.execute(function() {
-        return webdriver.promise.delayed(500).then(function() {
-          return webdriver.promise.when('a');
+        return wdpromise.delayed(500).then(function() {
+          return wdpromise.when('a');
         });
       }, 'getValueA');
     },
     getOtherValueA: function() {
       return flow.execute(function() {
-        return webdriver.promise.when('a');
+        return wdpromise.when('a');
       }, 'getOtherValueA');
     },
     getValueB: function() {
       return flow.execute(function() {
-        return webdriver.promise.when('b');
+        return wdpromise.when('b');
       }, 'getValueB');
     },
-    getBigNumber: function() {
+    getBigNumber: function(): wdpromise.Promise<number> {
       return flow.execute(function() {
-        return webdriver.promise.when(1111);
+        return wdpromise.when(1111);
       }, 'getBigNumber');
     },
-    getSmallNumber: function() {
+    getSmallNumber: function(): wdpromise.Promise<number> {
       return flow.execute(function() {
-        return webdriver.promise.when(11);
+        return wdpromise.when(11);
       }, 'getSmallNumber');
     },
-    getDecimalNumber: function() {
+    getDecimalNumber: function(): wdpromise.Promise<number> {
         return flow.execute(function() {
-          return webdriver.promise.when(3.14159);
+          return wdpromise.when(3.14159);
         }, 'getDecimalNumber');
       },
     getDisplayedElement: function() {
       return flow.execute(function() {
-        return webdriver.promise.when({
+        return wdpromise.when({
           isDisplayed: function() {
-            return webdriver.promise.when(true);
+            return wdpromise.when(true);
           }
         });
       }, 'getDisplayedElement');
     },
     getHiddenElement: function() {
       return flow.execute(function() {
-        return webdriver.promise.when({
+        return wdpromise.when({
           isDisplayed: function() {
-            return webdriver.promise.when(false);
+            return wdpromise.when(false);
           }
         });
       }, 'getHiddenElement');
     },
-    getValueList: function() {
+    getValueList: function(): wdpromise.Promise<Array<{getText: () => wdpromise.Promise<string>}>> {
       return flow.execute(function() {
-        return webdriver.promise.when([{
+        return wdpromise.when([{
           getText: function() {
-            return flow.execute(function() { return webdriver.promise.when('a');});
+            return flow.execute(function() { return wdpromise.when('a');});
           }
         }, {
           getText: function() {
-            return flow.execute(function() { return webdriver.promise.when('b');});
+            return flow.execute(function() { return wdpromise.when('b');});
           }
         }, {
           getText: function() {
-            return flow.execute(function() { return webdriver.promise.when('c');});
+            return flow.execute(function() { return wdpromise.when('c');});
           }
         }, {
           getText: function() {
-            return flow.execute(function() { return webdriver.promise.when('d');});
+            return flow.execute(function() { return wdpromise.when('d');});
           }
         }]);
       }, 'getValueList');
     },
     displayedElement: {
       isDisplayed: function() {
-        return webdriver.promise.when(true);
+        return wdpromise.when(true);
       }
     },
     hiddenElement: {
       isDisplayed: function() {
-        return webdriver.promise.when(false);
+        return wdpromise.when(false);
       }
     }
   };
 };
 
-exports.getMatchers = function() {
+export function getMatchers() {
   return {
     toBeLotsMoreThan: function() {
       return {
-        compare: function(actual, expected) {
+        compare: function(actual: number, expected: number) {
           return {
             pass: actual > expected + 100
           };
@@ -114,7 +114,7 @@ exports.getMatchers = function() {
     // Example custom matcher returning a promise that resolves to true/false.
     toBeDisplayed: function() {
       return {
-        compare: function(actual, expected) {
+        compare: function(actual: WebElement, expected: void) {
           return {
             pass: actual.isDisplayed()
           };
@@ -124,6 +124,17 @@ exports.getMatchers = function() {
   };
 };
 
-exports.isPending = function(managedPromise) {
-  return managedPromise.state_ === 'pending';
+// declare custom matcher types
+declare global {
+  namespace jasmine {
+    interface Matchers {
+      toBeLotsMoreThan(expected: number | Promise<number>): Promise<void>;
+      toBeDisplayed(): Promise<void>; 
+    }
+  }
+}
+
+
+export function isPending(managedPromise: wdpromise.Promise<any>) {
+  return (managedPromise as any).state_ === 'pending';
 };
diff --git a/tsconfig.json b/tsconfig.json
index 9d274dd..ec87d58 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,7 +6,7 @@
     "sourceMap": false,
     "declaration": false,
     "removeComments": false,
-    "noImplicitAny": false,
+    "noImplicitAny": true,
     "outDir": "built_spec"
   },
   "include": [