diff --git a/static/script.js b/static/script.js
index bc5a2b2..d947518 100644
--- a/static/script.js
+++ b/static/script.js
@@ -6,8 +6,24 @@ const qr_code = document.getElementById("qr-code");
 const error_message = document.getElementById("error");
 const copy_message = document.getElementById("copied");
 
-to_shorten_btn.addEventListener("click", async () => {
-   const original_url = url_input.value
+to_shorten_btn.addEventListener("click", shorten);
+addEventListener("keydown", (event) => {if(event.key == "Enter") shorten;});
+
+short_url.addEventListener("click", event => {
+    // copy the short url to clipboard
+    navigator.clipboard.writeText(event.target.innerText)
+    .then(() => {
+        // show a message
+        copy_message.style.opacity = "1";
+        setTimeout(() => copy_message.style.opacity = "0", 3000);
+    })
+    .catch(error => {
+        alert("An error has occurred...\n" + error);
+    });
+});
+
+const shorten = async () => {
+    const original_url = url_input.value
     // check if the url input is empty
     if (original_url.length === 0) {
         return;
@@ -52,20 +68,7 @@ to_shorten_btn.addEventListener("click", async () => {
     // get the qr code of the short url and show it
     qr_code.src = `https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=${result}`;
     qr_code.alt = result;
-});
-
-short_url.addEventListener("click", event => {
-    // copy the short url to clipboard
-    navigator.clipboard.writeText(event.target.innerText)
-    .then(() => {
-        // show a message
-        copy_message.style.opacity = "1";
-        setTimeout(() => copy_message.style.opacity = "0", 3000);
-    })
-    .catch(error => {
-        alert("An error has occurred...\n" + error);
-    });
-});
+}
 
 const rickroll = {
     check: (url)=>{
diff --git a/templates/about.html b/templates/about.html
index 4fcf003..2fac92b 100644
--- a/templates/about.html
+++ b/templates/about.html
@@ -11,6 +11,7 @@
     <section>
         <h2>About Krll</h2>
         <p>Krll은 개인정보 수집 없이 URL을 단축하는 서비스입니다. 방해꾼 없이 빠르게 URL을 단축하고 공유하세요.</p>
+        <p>repository: <a href="https://git.worldc.one/sunwoo1524/krll">https://git.worldc.one/sunwoo1524/krll</a></p>
 
         <h2>특징</h2>
         <ul>