diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..8ae90ce
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,26 @@
+export interface SearchParserOptions {
+  offsets?: boolean;
+  tokenize?: boolean;
+  keywords?: string[];
+  ranges?: string[];
+  alwaysArray?: boolean;
+}
+
+export interface ISearchParserDictionary {
+  [key: string]: any;
+}
+
+export interface SearchParserOffset {
+  keyword: string;
+  value?: string;
+  offsetStart: number;
+  offsetEnd: number;
+}
+
+export interface SearchParserResult extends ISearchParserDictionary {
+  text?: string;
+  offsets?: SearchParserOffset[];
+  exclude?: ISearchParserDictionary;
+}
+
+export function parse(string: string, options?: SearchParserOptions): string | SearchParserResult;
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..a373a79
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,14 @@
+{
+  "name": "search-query-parser",
+  "version": "1.4.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "typescript": {
+      "version": "3.3.3333",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.3.3333.tgz",
+      "integrity": "sha512-JjSKsAfuHBE/fB2oZ8NxtRTk5iGcg6hkYXMnZ3Wc+b2RSqejEqTaem11mHASMnFilHrax3sLK0GDzcJrekZYLw==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
index 87b5a35..3ccc0d3 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,8 @@
   },
   "homepage": "https://github.com/nepsilon/search-query-parser",
   "devDependencies": {
+    "mocha": "*",
     "should": "^3.2.0",
-    "mocha": "*"
+    "typescript": "^3.3.3333"
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..a2e16e7
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es5",
+    "composite": true,
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true
+  },
+  "include": [
+    "./lib/**/*"
+  ],
+  "exclude": []
+}
\ No newline at end of file
diff --git a/tslint.json b/tslint.json
new file mode 100644
index 0000000..30a1bdd
--- /dev/null
+++ b/tslint.json
@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}
\ No newline at end of file