diff --git a/pubspec.yaml b/pubspec.yaml
index 83356e8..9ea5239 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,7 +2,7 @@ name: color_chart
 description: A non-material and classified color chart for Flutter development.
 version: 0.1.0
 repository: https://github.com/aprosail/color-chart
-environment: {sdk: ">=3.4.0 <4.0.0", flutter: ">=3.22.0"}
+environment: {sdk: ">=3.3.4 <4.0.0", flutter: ">=3.19.0"}
 topics:
   - flutter
   - color