diff --git a/frontend/src/pages/ServerDetail.jsx b/frontend/src/pages/ServerDetail.jsx
index 53264c3..cf9d558 100644
--- a/frontend/src/pages/ServerDetail.jsx
+++ b/frontend/src/pages/ServerDetail.jsx
@@ -247,7 +247,7 @@ const ServerDetail = ({ isMobile = false }) => {
                       >
                         <div className="relative">
                           <img 
-                            src={`https://minotar.net/helm/${player.name}/24.png`} 
+                            src={`https://minotar.net/helm/${player.uuid}/24.png`} 
                             alt={player.name} 
                             className="w-6 h-6 rounded-sm"
                             onError={(e) => {
diff --git a/frontend/src/pages/WorldsPage.jsx b/frontend/src/pages/WorldsPage.jsx
index 80a91e6..100d3a0 100644
--- a/frontend/src/pages/WorldsPage.jsx
+++ b/frontend/src/pages/WorldsPage.jsx
@@ -47,7 +47,7 @@ const WorldsPage = ({ isMobile = false }) => {
     // 초기 데이터 요청
     socket.emit('get_worlds');
 
-    // 5초마다 갱신
+    // 1초마다 갱신
     const interval = setInterval(() => {
       socket.emit('get_worlds');
     }, 1000);
@@ -190,8 +190,8 @@ const WorldsPage = ({ isMobile = false }) => {
                               {/* 모바일: 머리만, PC: 전신 */}
                               <img 
                                 src={isMobile 
-                                  ? `https://mc-heads.net/avatar/${player.name}/40`
-                                  : `https://mc-heads.net/body/${player.name}/60`
+                                  ? `https://mc-heads.net/avatar/${player.uuid}/40`
+                                  : `https://mc-heads.net/body/${player.uuid}/60`
                                 }
                                 alt={player.name}
                                 className={isMobile ? 'w-10 h-10 rounded' : 'h-16 w-auto'}