diff --git a/packages/flutter_tools/pubspec.yaml b/packages/flutter_tools/pubspec.yaml
index 69e483142a0..d1b408245fb 100644
--- a/packages/flutter_tools/pubspec.yaml
+++ b/packages/flutter_tools/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: http://flutter.io
 author: Flutter Authors <flutter-dev@googlegroups.com>
 
 environment:
-  sdk: '>=1.13.0-dev.7.4 <2.0.0'
+  sdk: '>=1.12.0 <2.0.0'
 
 dependencies:
   archive: ^1.0.20