diff --git a/sdk/flutter/pubspec.yaml b/sdk/flutter/pubspec.yaml
index 06a04703..acdeba12 100644
--- a/sdk/flutter/pubspec.yaml
+++ b/sdk/flutter/pubspec.yaml
@@ -21,10 +21,10 @@ dependencies:
     sdk: flutter
 
   # System browser / platform auth session + app link callback
-  flutter_web_auth_2: ^4.0.0
+  flutter_web_auth_2: ">=4.0.0 <6.0.0"
 
   # Secure storage: Keychain (iOS/macOS), Keystore (Android), libsecret (Linux), DPAPI (Windows)
-  flutter_secure_storage: ^9.2.4
+  flutter_secure_storage: ">=9.2.4 <11.0.0"
 
   # PKCE S256: SHA-256 digest
   crypto: ^3.0.3
@@ -42,7 +42,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ^5.0.0
+  flutter_lints: ">=5.0.0 <7.0.0"
   mockito: ^5.4.4
   build_runner: ^2.4.9