diff --git a/public/vendor/ress.css b/public/vendor/ress@5.0.2.css
similarity index 100%
rename from public/vendor/ress.css
rename to public/vendor/ress@5.0.2.css
diff --git a/src/scripts/pages/about.js b/src/scripts/pages/about.js
index 7426ded..e2363a1 100644
--- a/src/scripts/pages/about.js
+++ b/src/scripts/pages/about.js
@@ -1,9 +1,7 @@
-export function aboutPageState() {
-  return {
-    count: 0,
-    
-    decrement() {
-      this.count--
-    }
+export const aboutPageState = () => ({
+  count: 0,
+
+  decrement() {
+    this.count--
   }
-}
+})
diff --git a/src/scripts/pages/index.js b/src/scripts/pages/index.js
index 7ebac58..dca2738 100644
--- a/src/scripts/pages/index.js
+++ b/src/scripts/pages/index.js
@@ -1,9 +1,7 @@
-export function indexPageState() {
-  return {
-    count: 0,
+export const indexPageState = () => ({
+  count: 0,
 
-    increment() {
-      this.count++
-    }
+  increment() {
+    this.count++
   }
-}
+})
diff --git a/src/view/components/document.lisp b/src/view/components/document.lisp
index e88e6fd..9b108ed 100644
--- a/src/view/components/document.lisp
+++ b/src/view/components/document.lisp
@@ -20,7 +20,7 @@
     (html :lang "ja"
       (head
         (meta :charset "UTF-8")
-        (link :rel "stylesheet" :type "text/css" :href "/vendor/ress.css")
+        (link :rel "stylesheet" :type "text/css" :href "/vendor/ress@5.0.2.css")
         (link :rel "stylesheet" :type "text/css" :href "/styles/global.css")
         (on-demand-stylesheets pi:children)
         (link :rel "preconnect" :href "https://fonts.googleapis.com")