diff --git a/types/filenamify/filenamify-tests.ts b/types/filenamify/filenamify-tests.ts
new file mode 100644
index 0000000000..212ff424cf
--- /dev/null
+++ b/types/filenamify/filenamify-tests.ts
@@ -0,0 +1,10 @@
+import * as filenamify from 'filenamify';
+
+filenamify('<foo/bar>');
+// => 'foo!bar'
+
+filenamify('foo:"bar"', {replacement: '🐴'});
+// => 'foo🐴bar'
+
+filenamify.path('/some/!path');
+// => '/some/path'
diff --git a/types/filenamify/index.d.ts b/types/filenamify/index.d.ts
new file mode 100644
index 0000000000..981b04443d
--- /dev/null
+++ b/types/filenamify/index.d.ts
@@ -0,0 +1,15 @@
+// Type definitions for filenamify 2.0
+// Project: https://github.com/sindresorhus/filenamify
+// Definitions by: Junyoung Choi <https://github.com/rokt33r>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function filenamify(input: string, options?: filenamify.Options): string;
+
+declare namespace filenamify {
+    interface Options {
+        replacement: string;
+    }
+    function path(input: string, options?: filenamify.Options): string;
+}
+
+export = filenamify;
diff --git a/types/filenamify/tsconfig.json b/types/filenamify/tsconfig.json
new file mode 100644
index 0000000000..aec1f33988
--- /dev/null
+++ b/types/filenamify/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "filenamify-tests.ts"
+    ]
+}
diff --git a/types/filenamify/tslint.json b/types/filenamify/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/filenamify/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}