diff --git a/app/(chat)/api/files/upload/route.ts b/app/(chat)/api/files/upload/route.ts
index 87dc422..f1020d4 100644
--- a/app/(chat)/api/files/upload/route.ts
+++ b/app/(chat)/api/files/upload/route.ts
@@ -85,8 +85,8 @@ async function optimizeImage(buffer: Buffer, mimeType: string): Promise<Buffer>
 const FileSchema = z.object({
   file: z
     .instanceof(Blob)
-    .refine((file) => file.size <= 8 * 1024 * 1024, {
-      message: "File size should be less than 8MB",
+    .refine((file) => file.size <= 20 * 1024 * 1024, {
+      message: "File size should be less than 20MB",
     })
     // Update the file type based on the kind of files you want to accept
     .refine((file) => ["image/jpeg", "image/png", "image/webp"].includes(file.type), {
diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index f65f940..aa523aa 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -866,8 +866,8 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
         continue;
       }
       
-      if (file.size > 8 * 1024 * 1024) {
-        toast.error('图片大小不能超过 8MB');
+      if (file.size > 20 * 1024 * 1024) {
+        toast.error('图片大小不能超过 20MB');
         continue;
       }
       
diff --git a/components/canvas/nodes/ImageNode.tsx b/components/canvas/nodes/ImageNode.tsx
index 4d2f416..501f1fe 100644
--- a/components/canvas/nodes/ImageNode.tsx
+++ b/components/canvas/nodes/ImageNode.tsx
@@ -271,9 +271,9 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       return;
     }
     
-    // 验证文件大小 (8MB)
-    if (file.size > 8 * 1024 * 1024) {
-      toast.error('图片大小不能超过 8MB');
+    // 验证文件大小 (20MB)
+    if (file.size > 20 * 1024 * 1024) {
+      toast.error('图片大小不能超过 20MB');
       return;
     }