diff --git a/internal/upload/handlers.go b/internal/upload/handlers.go
index 87161c5..ff5e240 100644
--- a/internal/upload/handlers.go
+++ b/internal/upload/handlers.go
@@ -14,7 +14,7 @@ import (
 	"github.com/minio/minio-go/v7/pkg/credentials"
 )
 
-const maxUploadSize = 25 << 20 // 25 MB per file
+const maxUploadSize = 1 << 30 // 1 GB per file
 
 var allowedExtensions = map[string]bool{
 	".jpg": true, ".jpeg": true, ".png": true, ".gif": true, ".webp": true,
diff --git a/web/src/components/MessageInput.tsx b/web/src/components/MessageInput.tsx
index dde1b8b..79781fe 100644
--- a/web/src/components/MessageInput.tsx
+++ b/web/src/components/MessageInput.tsx
@@ -371,7 +371,7 @@ export const MessageInput = forwardRef<HTMLTextAreaElement, MessageInputProps>(f
   const validateFile = useCallback((file: File): string | null => {
     const ext = file.name.slice(file.name.lastIndexOf(".")).toLowerCase();
     if (!SAFE_EXTS.has(ext)) return `File type "${ext}" not allowed.`;
-    if (file.size > 25 * 1024 * 1024) return "File too large (max 25 MB).";
+    if (file.size > 1024 * 1024 * 1024) return "File too large (max 1 GB).";
     return null;
   }, []);