diff --git a/pubspec.yaml b/pubspec.yaml
index f635593..1ed0d2b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,12 @@
 name: node_shims
-version: 0.1.3
+version: 0.1.4
 author: Demis Bellot <demis.bellot@gmail.com>
 description: Common node and js utils to help in porting of node.js and javascript libs to dart.
 homepage: https://github.com/dartist/node_shims/
+environment:
+  sdk: '>=1.20.1 <=2.1.0'
 dependencies:
-  unittest: any
+  test: any
 
 #dependencies:
 #  unittest: any
\ No newline at end of file