diff --git a/main/index.php b/main/index.php
index 12f0cb5..0da0eae 100644
--- a/main/index.php
+++ b/main/index.php
@@ -81,6 +81,7 @@ try {
         <div class="header">
             <h1>Text0Nly</h1>
             <div class="header-buttons">
+                <a href="https://git.sr.ht/~iwakuralain/text0Nly" target="_blank" class="source-btn">Source code</a>
                 <?php if (isset($_SESSION['username'])): ?>
                     <span>👤 <?= htmlspecialchars($_SESSION['username']) ?><?php if (!empty($_SESSION['is_moderator'])) echo ' (mod)'; ?></span>
                     <a href="?logout=1">Logout</a>
diff --git a/main/styles.css b/main/styles.css
index f789212..81959ed 100644
--- a/main/styles.css
+++ b/main/styles.css
@@ -36,6 +36,18 @@ body {
     font-size: 1em;
 }
 
+.source-btn {
+    background: #222;
+    color: #fff !important;
+    padding: 4px 12px;
+    border-radius: 4px;
+    text-decoration: none !important;
+}
+
+.source-btn:hover {
+    background: #444;
+}
+
 .messages-container {
     flex: 1;
     margin-bottom: 18px;