diff --git a/pubspec.yaml b/pubspec.yaml
index e07c6368..567852ca 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,6 +3,8 @@ author: Tobe O <thosakwe@gmail.com>
 version: 1.1.1
 description: Parse request bodies and query strings in Dart. Supports JSON, URL-encoded, and multi-part bodies.
 homepage: https://github.com/angel-dart/body_parser
+environment:
+  sdk: ">=1.8.0 <3.0.0"
 dependencies:
   dart2_constant: ^1.0.0
   http_parser: ">=3.1.1 <4.0.0"