diff --git a/types/ignore-styles/ignore-styles-tests.ts b/types/ignore-styles/ignore-styles-tests.ts
new file mode 100644
index 0000000000..1a7dbc74c1
--- /dev/null
+++ b/types/ignore-styles/ignore-styles-tests.ts
@@ -0,0 +1,15 @@
+import register, { DEFAULT_EXTENSIONS, oldHandlers, noOp, restore } from 'ignore-styles';
+
+register(['.css'], (module, filename) => {}); // $ExpectType void
+register(['.css']); // $ExpectType void
+register(undefined, (module, filename) => {}); // $ExpectType void
+register([1], (module, filename) => {}); // $ExpectError
+register(['.css'], 1); // $ExpectError
+
+DEFAULT_EXTENSIONS[0]; // $ExpectType string
+
+oldHandlers['.css']; // $ExpectType Handler
+
+noOp(); // $ExpectType void
+
+restore(); // $ExpectType void
diff --git a/types/ignore-styles/index.d.ts b/types/ignore-styles/index.d.ts
new file mode 100644
index 0000000000..2eab90b591
--- /dev/null
+++ b/types/ignore-styles/index.d.ts
@@ -0,0 +1,24 @@
+// Type definitions for ignore-styles 5.0
+// Project: https://github.com/bkonkle/ignore-styles
+// Definitions by: Taiju Muto <https://github.com/tai2>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+/// <reference types='node' />
+
+export type Handler = (m: NodeModule, filename: string) => any;
+
+export const DEFAULT_EXTENSIONS: string[];
+
+export let oldHandlers: {
+    [ext: string]: Handler
+};
+
+export function noOp(): void;
+
+export function restore(): void;
+
+export default function register(
+    extensions?: string[],
+    handler?: Handler
+): void;
diff --git a/types/ignore-styles/tsconfig.json b/types/ignore-styles/tsconfig.json
new file mode 100644
index 0000000000..aed3487cf4
--- /dev/null
+++ b/types/ignore-styles/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "ignore-styles-tests.ts"
+    ]
+}
diff --git a/types/ignore-styles/tslint.json b/types/ignore-styles/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/ignore-styles/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }