diff --git a/frontend/src/lib/components/StringTypeNarrowing.svelte b/frontend/src/lib/components/StringTypeNarrowing.svelte
index 955ccd6fde..bbecfae658 100644
--- a/frontend/src/lib/components/StringTypeNarrowing.svelte
+++ b/frontend/src/lib/components/StringTypeNarrowing.svelte
@@ -67,7 +67,7 @@
 
 	$: {
 		if (format == 'email') {
-			pattern = '^[\\w-+.]+@([\\w-]+\\.)+[\\w-]{2,4}$'
+			pattern = '^[\\w-+.]+@([\\w-]+\\.)+[\\w-]{2,63}$'
 		}
 	}