diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 54ae0cdc8c..d68e3061cc 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -22,6 +22,7 @@ All definitions files include a header with the author and editors, so at some p
 * [Atom](https://atom.io/) (by [vvakame](https://github.com/vvakame))
 * [Backbone.js](http://backbonejs.org/) (by [Boris Yankov](https://github.com/borisyankov))
 * [Backbone Relational](http://backbonerelational.org/) (by [Eirik Hoem](https://github.com/eirikhm))
+* [BigInteger](https://github.com/peterolson/BigInteger.js) (by [Ingo Bürk](https://github.com/Airblader))
 * [BigScreen](http://brad.is/coding/BigScreen/) (by [Douglas Eichelberger](https://github.com/dduugg))
 * [Bluebird](https://github.com/petkaantonov/bluebird) (by [Bart van der Schoor](https://github.com/Bartvds))
 * [Bootbox](https://github.com/makeusabrew/bootbox) (by [Vincent Bortone](https://github.com/vbortone/))
diff --git a/bigInteger/bigInteger-tests.ts b/bigInteger/bigInteger-tests.ts
new file mode 100644
index 0000000000..7940b86296
--- /dev/null
+++ b/bigInteger/bigInteger-tests.ts
@@ -0,0 +1,95 @@
+/// <reference path="bigInteger.d.ts" />
+
+// constructor tests
+var noArgument = bigInt(),
+    numberArgument = bigInt( 93 ),
+    stringArgument = bigInt( "75643564363473453456342378564387956906736546456235345" ),
+    bigIntArgument = bigInt( noArgument );
+
+// method tests
+var x = bigInt(),
+    isBigInteger: BigInteger,
+    isNumber: number,
+    isBoolean: boolean,
+    isString: string,
+    isDivmod: {
+        quotient: BigInteger;
+        remainder: BigInteger;
+    };
+
+isBigInteger = x.abs();
+
+isBigInteger = x.add( 0 );
+isBigInteger = x.add( x );
+
+isBigInteger = x.compare( 0 );
+isBigInteger = x.compare( x );
+
+isBigInteger = x.compareAbs( 0 );
+isBigInteger = x.compareAbs( x );
+
+isBigInteger = x.divide( 0 );
+isBigInteger = x.divide( x );
+
+isDivmod = x.divmod( 0 );
+isDivmod = x.divmod( x );
+
+isBoolean = x.equals( 0 );
+isBoolean = x.equals( x );
+
+isBoolean = x.greater( 0 );
+isBoolean = x.greater( x );
+
+isBoolean = x.greaterOrEquals( 0 );
+isBoolean = x.greaterOrEquals( x );
+
+isBoolean = x.isEven();
+
+isBoolean = x.isNegative();
+
+isBoolean = x.isOdd();
+
+isBoolean = x.isPositive();
+
+isBoolean = x.lesser( 0 );
+isBoolean = x.lesser( x );
+
+isBoolean = x.lesserOrEquals( 0 );
+isBoolean = x.lesserOrEquals( x );
+
+isBigInteger = x.minus( 0 );
+isBigInteger = x.minus( x );
+
+isBigInteger = x.mod( 0 );
+isBigInteger = x.mod( x );
+
+isBigInteger = x.multiply( 0 );
+isBigInteger = x.multiply( x );
+
+isBigInteger = x.next();
+
+isBoolean = x.notEquals( 0 );
+isBoolean = x.notEquals( x );
+
+isBigInteger = x.over( 0 );
+isBigInteger = x.over( x );
+
+isBigInteger = x.plus( 0 );
+isBigInteger = x.plus( x );
+
+isBigInteger = x.pow( 0 );
+isBigInteger = x.pow( x );
+
+isBigInteger = x.prev();
+
+isBigInteger = x.subtract( 0 );
+isBigInteger = x.subtract( x );
+
+isBigInteger = x.times( 0 );
+isBigInteger = x.times( x );
+
+isNumber = x.toJSNumber();
+
+isString = x.toString();
+
+isNumber = x.valueOf();
\ No newline at end of file
diff --git a/bigInteger/bigInteger.d.ts b/bigInteger/bigInteger.d.ts
new file mode 100644
index 0000000000..ed03fc5ea1
--- /dev/null
+++ b/bigInteger/bigInteger.d.ts
@@ -0,0 +1,161 @@
+// Type definitions for BigInteger.js
+// Project: https://github.com/peterolson/BigInteger.js
+// Definitions by: Ingo Bürk <https://github.com/Airblader>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface BigInteger {
+    /** Returns the absolute value of a bigInt. */
+    abs(): BigInteger;
+
+    /** Performs addition */
+    add( number: number ): BigInteger;
+    /** Performs addition */
+    add( number: BigInteger ): BigInteger;
+
+    /** Alias for the add method. */
+    plus( number: number ): BigInteger;
+    /** Alias for the add method. */
+    plus( number: BigInteger ): BigInteger;
+
+    /** Alias for the subtract method. */
+    minus( number: number ): BigInteger;
+    /** Alias for the subtract method. */
+    minus( number: BigInteger ): BigInteger;
+
+    /** Performs subtraction. */
+    subtract( number: number ): BigInteger;
+    /** Performs subtraction. */
+    subtract( number: BigInteger ): BigInteger;
+
+    /** Performs multiplication. */
+    multiply( number: number ): BigInteger;
+    /** Performs multiplication. */
+    multiply( number: BigInteger ): BigInteger;
+
+    /** Alias for the multiply method. */
+    times( number: number ): BigInteger;
+    /** Alias for the multiply method. */
+    times( number: BigInteger ): BigInteger;
+
+    /** Performs integer division, disregarding the remainder. */
+    divide( number: number ): BigInteger;
+    /** Performs integer division, disregarding the remainder. */
+    divide( number: BigInteger ): BigInteger;
+
+    /** Alias for the divide method. */
+    over( number: number ): BigInteger;
+    /** Alias for the divide method. */
+    over( number: BigInteger ): BigInteger;
+
+    /** Performs exponentiation. If the exponent is less than 0, pow returns 0. bigInt.zero.pow(0) returns 1. */
+    pow( number: number ): BigInteger;
+    /** Performs exponentiation. If the exponent is less than 0, pow returns 0. bigInt.zero.pow(0) returns 1. */
+    pow( number: BigInteger ): BigInteger;
+
+    /** Adds one to the number. */
+    next(): BigInteger;
+
+    /** Subtracts one from the number. */
+    prev(): BigInteger;
+
+    /** Performs division and returns the remainder, disregarding the quotient. The sign of the remainder will match the sign of the dividend. */
+    mod( number: number ): BigInteger;
+    /** Performs division and returns the remainder, disregarding the quotient. The sign of the remainder will match the sign of the dividend. */
+    mod( number: BigInteger ): BigInteger;
+
+    /** Performs division and returns an object with two properties: quotient and remainder. The sign of the remainder will match the sign of the dividend. */
+    divmod( number: number ): { quotient: BigInteger; remainder: BigInteger };
+    /** Performs division and returns an object with two properties: quotient and remainder. The sign of the remainder will match the sign of the dividend. */
+    divmod( number: BigInteger ): { quotient: BigInteger; remainder: BigInteger };
+
+    /** Checks if the first number is greater than the second. */
+    greater( number: number ): boolean;
+    /** Checks if the first number is greater than the second. */
+    greater( number: BigInteger ): boolean;
+
+    /** Checks if the first number is greater than or equal to the second. */
+    greaterOrEquals( number: number ): boolean;
+    /** Checks if the first number is greater than or equal to the second. */
+    greaterOrEquals( number: BigInteger ): boolean;
+
+    /** Checks if the first number is lesser than the second. */
+    lesser( number: number ): boolean;
+    /** Checks if the first number is lesser than the second. */
+    lesser( number: BigInteger ): boolean;
+
+    /** Checks if the first number is less than or equal to the second. */
+    lesserOrEquals( number: number ): boolean;
+    /** Checks if the first number is less than or equal to the second. */
+    lesserOrEquals( number: BigInteger ): boolean;
+
+    /** Returns true if the number is even, false otherwise. */
+    isEven(): boolean;
+
+    /** Returns true if the number is odd, false otherwise. */
+    isOdd(): boolean;
+
+    /** Return true if the number is positive, false otherwise. Returns true for 0 and false for -0. */
+    isPositive(): boolean;
+
+    /** Returns true if the number is negative, false otherwise. Returns false for 0 and true for -0. */
+    isNegative(): boolean;
+
+    /**
+     * Performs a comparison between two numbers. If the numbers are equal, it returns 0.
+     * If the first number is greater, it returns 1. If the first number is lesser, it returns -1.
+     */
+    compare( number: number ): BigInteger;
+    /**
+     * Performs a comparison between two numbers. If the numbers are equal, it returns 0.
+     * If the first number is greater, it returns 1. If the first number is lesser, it returns -1.
+     */
+    compare( number: BigInteger ): BigInteger;
+
+    /** Performs a comparison between the absolute value of two numbers. */
+    compareAbs( number: number ): BigInteger;
+    /** Performs a comparison between the absolute value of two numbers. */
+    compareAbs( number: BigInteger ): BigInteger;
+
+    /** Checks if two numbers are equal. */
+    equals( number: number ): boolean;
+    /** Checks if two numbers are equal. */
+    equals( number: BigInteger ): boolean;
+
+    /** Checks if two numbers are not equal. */
+    notEquals( number: number ): boolean;
+    /** Checks if two numbers are not equal. */
+    notEquals( number: BigInteger ): boolean;
+
+    /** Converts a bigInt into a native Javascript number. Loses precision for numbers outside the range. */
+    toJSNumber(): number;
+
+    /** Converts a bigInt to a string. */
+    toString(): string;
+
+    /** Converts a bigInt to a native Javascript number. This override allows you to use native arithmetic operators without explicit conversion. */
+    valueOf(): number;
+}
+
+interface BigIntegerStatic {
+    /** Equivalent to bigInt(1) */
+    one: BigInteger;
+    /** Equivalent to bigInt(0) */
+    zero: BigInteger;
+    /** Equivalent to bigInt(-1) */
+    minusOne: BigInteger;
+
+    /** Equivalent to bigInt(0) */
+    (): BigInteger;
+    /** Parse a Javascript number into a bigInt */
+    ( number: number ): BigInteger;
+    /** Parse a string into a bigInt */
+    ( string: string ): BigInteger;
+    /** no-op */
+    ( bigInt: BigInteger ): BigInteger;
+}
+
+declare var bigInt: BigIntegerStatic;
+
+declare module "BigInteger" {
+    export = bigInt;
+}
\ No newline at end of file