diff --git a/pubspec.yaml b/pubspec.yaml
index 57649d5a..47448c39 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 0.0.9
 homepage: https://github.com/diegogarciar/twilio_voice
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
   flutter: ">=1.20.0"
 
 dependencies: