diff --git a/web/examples/null_aware/nullaware1.dart b/web/examples/null_aware/nullaware1.dart
index aead0b4..0af5d99 100644
--- a/web/examples/null_aware/nullaware1.dart
+++ b/web/examples/null_aware/nullaware1.dart
@@ -12,7 +12,7 @@ main() {
   print('next appointment: $next');
 
   // the ? operator calls a function IFF the object is not null
-  String thursday;
+  String? thursday;
   var length = thursday?.length;
   print('length: $length');
 
diff --git a/web/examples/values/index.md b/web/examples/values/index.md
index 990befa..d2ff7bd 100644
--- a/web/examples/values/index.md
+++ b/web/examples/values/index.md
@@ -10,6 +10,7 @@ template: web/templates/_example.mustache
 
 ```bash
 $ dart values.dart
+dartlang
 1+1=2
 7.0/3.0 =2.3333333333333335
 false