diff --git a/pubspec.yaml b/pubspec.yaml
index fa50e88..7f77fbe 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,7 +10,7 @@ description: A new Flutter project.
 version: 1.1.0+4
 
 environment:
-  sdk: ">=2.3.0 <3.0.0"
+  sdk: ">=2.6.0 <3.0.0"
 
 dependencies:
   flutter: