diff --git a/.flutter-plugins b/.flutter-plugins
index e4a9e1c..0356e7d 100644
--- a/.flutter-plugins
+++ b/.flutter-plugins
@@ -1 +1,2 @@
+# This is a generated file; do not edit or check into version control.
 shared_preferences=/home/vjrj/bin/flutter/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.4.2/
diff --git a/.flutter-plugins-dependencies b/.flutter-plugins-dependencies
new file mode 100644
index 0000000..4c47cd6
--- /dev/null
+++ b/.flutter-plugins-dependencies
@@ -0,0 +1 @@
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"shared_preferences","path":"/home/vjrj/bin/flutter/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.4.2/","dependencies":[]}],"android":[{"name":"shared_preferences","path":"/home/vjrj/bin/flutter/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.4.2/","dependencies":[]}],"macos":[],"linux":[],"windows":[],"web":[]},"dependencyGraph":[{"name":"shared_preferences","dependencies":[]}],"date_created":"2020-12-27 22:12:21.200817","version":"1.25.0-8.1.pre"}
\ No newline at end of file
diff --git a/pubspec.yaml b/pubspec.yaml
index 1967438..09aaca1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,6 +4,9 @@ version: 0.0.12
 author:
 homepage:
 
+environment:
+  sdk: ">=2.7.0 <3.0.0"
+
 dependencies:
   flutter:
     sdk: flutter