diff --git a/pubspec.yaml b/pubspec.yaml
index 160b1ea..62aa1e4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.0.0
 # repository: https://github.com/my_org/my_repo
 
 environment:
-  sdk: '>=2.19.0-96.0.dev <3.0.0'
+  sdk: '>=2.18.6 <3.0.0'
 
 # Add regular dependencies here.
 dependencies: