diff --git a/pubspec.lock b/pubspec.lock
index dd1117d..e01b47c 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -155,7 +155,7 @@ packages:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0+1"
+    version: "1.9.0"
   petitparser:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 9f02971..cb97cbf 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ version: 1.0.0+1
 
 environment:
   #sdk: ">=2.1.0 <3.0.0"
-  sdk: ">=2.5.2 <3.0.0"
+  sdk: ">=2.6.0 <3.0.0"
 
 dependencies:
   flutter:
@@ -34,7 +34,6 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec