diff --git a/pubspec.lock b/pubspec.lock
index 3ce0787..f23587f 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -2,4 +2,4 @@
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages: {}
 sdks:
-  dart: ">=2.1.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 12fe530..f9a48b0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,7 +6,7 @@ homepage: https://devslane.com
 repository: https://github.com/devslane/Avataar-Generator
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies: