diff --git a/pubspec.yaml b/pubspec.yaml
index be67d9d..8edd5d3 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: https://github.com/Betterment/sturdy_http
 repository: https://github.com/Betterment/sturdy_http
 
 environment:
-  sdk: ">=3.0.7 <4.0.0"
+  sdk: ">=3.4.0 <4.0.0"
 
 dependencies:
   collection: ^1.19.0