diff --git a/package.json b/package.json
index a19c3ac..3e834b1 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "scripts": {
         "test": "grunt"
     },
+    "typings": "types.d.ts",
     "keywords": ["nodemailer", "sendgrid"],
     "author": "Andris Reinman",
     "license": "MIT",
diff --git a/types.d.ts b/types.d.ts
new file mode 100644
index 0000000..82e0e9a
--- /dev/null
+++ b/types.d.ts
@@ -0,0 +1,7 @@
+export interface SendgridOptions {
+  apiKey: string
+}
+
+export default function sendgrid(
+  options: SendgridOptions
+): import('nodemailer').Transport