diff --git a/packages/app/src/pages/affine.tsx b/packages/app/src/pages/affine.tsx
index 1b5050a694..10a8cc78e2 100644
--- a/packages/app/src/pages/affine.tsx
+++ b/packages/app/src/pages/affine.tsx
@@ -32,7 +32,7 @@ export const StyledAnimateRadio = styled('div')<{ shrink: boolean }>(
       background: '#F1F3FF',
       position: 'relative',
       display: 'flex',
-      transition:'all .3s',
+      transition: 'all .3s',
       '::after': {
         content: '""',
         width: '1px',