diff --git a/types/roll/index.d.ts b/types/roll/index.d.ts
new file mode 100644
index 0000000000..7c3e4f70be
--- /dev/null
+++ b/types/roll/index.d.ts
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+// Type definitions for roll 1.2
+// Project: https://github.com/troygoode/node-roll/
+// Definitions by: icopp <https://github.com/icopp>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+type RollTransformation = RollTransformationKey | [RollTransformationKey, number] | ((results: number[]) => number[]);
+
+type RollTransformationKey = 'sum' | 'add' | 'subtract' | 'multiply' | 'divide' | 'best-of' | 'worst-of';
+
+interface RollObject {
+    quantity: number;
+    sides: number;
+    transformations: RollTransformation[];
+    toString: () => string;
+}
+
+interface RollOutput {
+    input: RollObject;
+    calculations: number[];
+    rolled: number[];
+    result: number;
+}
+
+declare class InvalidInputError extends Error {
+    name: 'InvalidInputError';
+}
+
+declare class Roll {
+    static InvalidInputError: InvalidInputError;
+
+    constructor(seed?: () => number);
+
+    /**
+     * Validate user input
+     */
+    validate(input: string): boolean;
+
+    /**
+     * Parse a string into a roll object
+     * @throws InvalidInputError
+     */
+    parse(input: string): {
+        quantity: number;
+        sides: number;
+        transformations: RollTransformation[];
+        toString: () => string;
+    };
+
+    /**
+     * Roll based on a string or roll object
+     */
+    roll(input: string | RollObject): RollOutput;
+}
+
+export = Roll;
diff --git a/types/roll/roll-tests.ts b/types/roll/roll-tests.ts
new file mode 100644
index 0000000000..bf28963e05
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+++ b/types/roll/roll-tests.ts
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+import Roll = require('roll');
+
+// $ExpectType Roll
+const roll = new Roll();
+
+// $ExpectType number
+roll.roll('d6').result;
+
+// $ExpectType number
+roll.roll({
+    quantity: 2,
+    sides: 6,
+    transformations: [
+      'sum',
+      ['add', 2]
+    ]
+}).result;
+
+// $ExpectType InvalidInputError
+Roll.InvalidInputError;
diff --git a/types/roll/tsconfig.json b/types/roll/tsconfig.json
new file mode 100644
index 0000000000..6d7640286d
--- /dev/null
+++ b/types/roll/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "roll-tests.ts"
+    ]
+}
diff --git a/types/roll/tslint.json b/types/roll/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/roll/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }