diff --git a/thermion_dart/pubspec.yaml b/thermion_dart/pubspec.yaml
index de69b194..453af0b1 100644
--- a/thermion_dart/pubspec.yaml
+++ b/thermion_dart/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: https://thermion.dev
 repository: https://github.com/nmfisher/thermion
 
 environment:
-  sdk: ">=3.5.0 <4.0.0"
+  sdk: ">=3.6.0-0 <4.0.0"
 
 dependencies:
   vector_math: ^2.1.2