diff --git a/types/fast-chunk-string/fast-chunk-string-tests.ts b/types/fast-chunk-string/fast-chunk-string-tests.ts
new file mode 100644
index 0000000000..b210730351
--- /dev/null
+++ b/types/fast-chunk-string/fast-chunk-string-tests.ts
@@ -0,0 +1,19 @@
+import fastChunkString = require("fast-chunk-string");
+
+// $ExpectType string[]
+fastChunkString("AABBCC", { size: 2 });
+
+// $ExpectType string[]
+fastChunkString("😀😃😄😁", { size: 2, unicodeAware: false });
+
+// $ExpectType string[]
+fastChunkString("😀😃😄😁", { size: 2, unicodeAware: true });
+
+// $ExpectError
+fastChunkString("missing options");
+
+// $ExpectError
+fastChunkString("missing size", { unicodeAware: false });
+
+// $ExpectError
+fastChunkString(null, { size: 2 });
diff --git a/types/fast-chunk-string/index.d.ts b/types/fast-chunk-string/index.d.ts
new file mode 100644
index 0000000000..a6f7cf016f
--- /dev/null
+++ b/types/fast-chunk-string/index.d.ts
@@ -0,0 +1,13 @@
+// Type definitions for fast-chunk-string 1.0
+// Project: https://github.com/vladgolubev/fast-chunk-string#readme
+// Definitions by: Junxiao Shi <https://github.com/yoursunny>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+interface Options {
+    size: number;
+    unicodeAware?: boolean;
+}
+
+declare function fastChunkString(str: string, options: Options): string[];
+
+export = fastChunkString;
diff --git a/types/fast-chunk-string/tsconfig.json b/types/fast-chunk-string/tsconfig.json
new file mode 100644
index 0000000000..db15ec5cbe
--- /dev/null
+++ b/types/fast-chunk-string/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",
+        "fast-chunk-string-tests.ts"
+    ]
+}
diff --git a/types/fast-chunk-string/tslint.json b/types/fast-chunk-string/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/fast-chunk-string/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }