diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..48674db
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,16 @@
+interface SqlLiteral {
+  text: string;
+  values: any[];
+}
+
+export default function SQLTag(
+  parts: TemplateStringsArray,
+  ...values: any[]
+): SqlLiteral;
+
+export function sqlLiteral(value: string): SqlLiteral;
+
+export function join(
+  array: SqlLiteral[],
+  separator: SqlLiteral | string
+): SqlLiteral;
diff --git a/package.json b/package.json
index 76d3271..f927ed6 100644
--- a/package.json
+++ b/package.json
@@ -5,8 +5,10 @@
   "repository": "XeCycle/pg-template-tag",
   "files": [
     "*.js",
+    "*.d.ts",
     "README.md"
   ],
+  "types": "index.d.ts",
   "scripts": {
     "prepublish": "node build.js",
     "test": "mocha test.js"