diff --git a/examples/with-first-chunk-cache-ssr/src/components/Box/index.tsx b/examples/with-first-chunk-cache-ssr/src/components/Box/index.tsx
index f33528d167..3acf3e52d1 100644
--- a/examples/with-first-chunk-cache-ssr/src/components/Box/index.tsx
+++ b/examples/with-first-chunk-cache-ssr/src/components/Box/index.tsx
@@ -44,8 +44,8 @@ async function getData() {
   ];
 
   return [
-    images[Math.round(Math.random() * images.length - 1)],
-    images[Math.round(Math.random() * images.length - 1)],
-    images[Math.round(Math.random() * images.length - 1)],
+    images[Math.floor(Math.random() * images.length)],
+    images[Math.floor(Math.random() * images.length)],
+    images[Math.floor(Math.random() * images.length)],
   ];
 }
\ No newline at end of file
diff --git a/examples/with-first-chunk-cache-ssr/src/components/List/index.tsx b/examples/with-first-chunk-cache-ssr/src/components/List/index.tsx
index e468c436c9..46e7136f8c 100644
--- a/examples/with-first-chunk-cache-ssr/src/components/List/index.tsx
+++ b/examples/with-first-chunk-cache-ssr/src/components/List/index.tsx
@@ -55,27 +55,27 @@ async function getData() {
 
   return [
     {
-      logo: images[Math.round(Math.random() * images.length - 1)],
+      logo: images[Math.floor(Math.random() * images.length)],
       title: 'ice.js',
       description: '这是 ICE 框架',
     },
     {
-      logo: images[Math.round(Math.random() * images.length - 1)],
+      logo: images[Math.floor(Math.random() * images.length)],
       title: 'ice.js',
       description: '这是 ICE 框架',
     },
     {
-      logo: images[Math.round(Math.random() * images.length - 1)],
+      logo: images[Math.floor(Math.random() * images.length)],
       title: 'ice.js',
       description: '这是 ICE 框架',
     },
     {
-      logo: images[Math.round(Math.random() * images.length - 1)],
+      logo: images[Math.floor(Math.random() * images.length)],
       title: 'ice.js',
       description: '这是 ICE 框架',
     },
     {
-      logo: images[Math.round(Math.random() * images.length - 1)],
+      logo: images[Math.floor(Math.random() * images.length)],
       title: 'ice.js',
       description: '这是 ICE 框架',
     },