diff --git a/lib/index.d.ts b/lib/index.d.ts
index 2903897..7baf262 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -1,5 +1,7 @@
 import type { ShowdownExtension } from "showdown";
 
+export function addListener(className: string): void;
+
 declare function showdownCopyCode({ className }?: {
     className?: string;
 }): ShowdownExtension[];
diff --git a/lib/index.js b/lib/index.js
index 3bd66e7..4b6485e 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,4 +1,8 @@
-function addListener() {
+/**
+ * Adds an event listener to the window that listens for clicks.
+ * @param {String} className The class name of the button. 
+ */
+function addListener(className) {
   if (typeof window !== "undefined" && window.copyCodeListener !== true) {
     window.addEventListener("click", (e) => {
       if (e.target?.classList?.contains(className) && e.target.nextElementSibling?.tagName === "PRE") {
@@ -24,7 +28,7 @@ module.exports = function showdownCopyCode({ className = "copy-code" } = {}) {
     {
       type: "output",
       filter: function (text) {
-        addListener();
+        addListener(className);
 
         return text.replace(
             /<pre.*><code/g,
diff --git a/package.json b/package.json
index 032b5b0..b54e26f 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "copy"
   ],
   "license": "MIT",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "main": "lib/index.js",
   "author": "Piotr Placzek (piotrpdev)",
   "scripts": {