diff --git a/index.html b/index.html
index f749af40..1e7afdc1 100644
--- a/index.html
+++ b/index.html
@@ -11,6 +11,20 @@
       href="https://cdn.jsdelivr.net/gh/sun-typeface/SUIT/fonts/static/woff2/SUIT.css"
       rel="stylesheet"
     />
+    <link
+      rel="preload"
+      href="https://cdn.jsdelivr.net/gh/sun-typeface/SUIT/fonts/static/woff2/SUIT.css"
+      as="font"
+      type="font/woff2"
+      crossorigin="anonymous"
+    />
+    <link
+      rel="preload"
+      href="https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_four@1.2/JalnanOTF00.woff"
+      as="font"
+      type="font/woff"
+      crossorigin="anonymous"
+    />
     <!-- Open Graph -->
     <meta property="og:type" content="website" />
     <meta property="og:url" content="https://oceanletter.site/" />
diff --git a/public/robots.txt b/public/robots.txt
new file mode 100644
index 00000000..b222e967
--- /dev/null
+++ b/public/robots.txt
@@ -0,0 +1,3 @@
+User-agent: *
+Allow: /
+Disallow: /admin
diff --git a/src/main.css b/src/main.css
index c8634805..6c6a61e4 100644
--- a/src/main.css
+++ b/src/main.css
@@ -1,6 +1,7 @@
 *,
 body {
   font-family: 'SUIT', sans-serif;
+  font-display: swap;
 }
 
 a {
@@ -14,4 +15,5 @@ a {
   font-family: 'Jalnan OTF';
   src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_four@1.2/JalnanOTF00.woff')
     format('woff');
+  font-display: swap;
 }