diff --git a/index.d.ts b/index.d.ts
deleted file mode 100644
index 1a426c4..0000000
--- a/index.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-// Type definitions for mailgo
-// Project: mailgo
-// Definitions by: Matteo Manzinello <https://matteomanzinello.com>
-
-export as namespace Mailgo;
-
-export function mailgo(mailgoConfig?: any): void;
diff --git a/mailgo.d.ts b/mailgo.d.ts
new file mode 100644
index 0000000..9ef8ad3
--- /dev/null
+++ b/mailgo.d.ts
@@ -0,0 +1,9 @@
+// Type definitions for mailgo
+// Project: mailgo
+// Definitions by: Matteo Manzinello <https://matteomanzinello.com>
+
+export type MailgoConfig = {
+  initEvent?: string;
+};
+
+export default function mailgo(mailgoConfig?: MailgoConfig): void;
diff --git a/src/mailgo.ts b/src/mailgo.ts
index a02f19d..ba88e34 100644
--- a/src/mailgo.ts
+++ b/src/mailgo.ts
@@ -1,3 +1,5 @@
+import { MailgoConfig } from "../mailgo";
+
 // links
 const MAILTO: string = "mailto:";
 const TEL: string = "tel:";
@@ -830,7 +832,7 @@ const mailgoStyle = (): void => {
 };
 
 // mailgo
-const mailgo = (mailgoConfig?: any): void => {
+const mailgo = (mailgoConfig?: MailgoConfig): void => {
   // if the window is defined...
   if (window && typeof window !== "undefined") {
     // add the style for mailgo