diff --git a/pubspec.lock b/pubspec.lock
index c8c37a6..ba8f59e 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -210,3 +210,4 @@ packages:
     version: "0.1.4-beta"
 sdks:
   dart: ">=3.1.0-185.0.dev <4.0.0"
+  flutter: ">=1.12.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 2a5fcaf..c594b8a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,6 +5,7 @@ homepage: https://github.com/diefferson/http_certificate_pinning
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
+  flutter: ">=1.12.0"
 
 dependencies:
   dio: ^5.3.2