diff --git a/lib/src/widgets/checkout/card_checkout.dart b/lib/src/widgets/checkout/card_checkout.dart
index 3ffb383f..93f76301 100644
--- a/lib/src/widgets/checkout/card_checkout.dart
+++ b/lib/src/widgets/checkout/card_checkout.dart
@@ -54,7 +54,10 @@ class _CardCheckoutState extends BaseCheckoutMethodState<CardCheckout> {
           new Text(
             Strings.cardInputInstruction,
             key: Key("InstructionKey"),
-            style: const TextStyle(fontWeight: FontWeight.w500),
+            style: TextStyle(
+              fontWeight: FontWeight.w500,
+              color: Theme.of(context).colorScheme.onSurface
+            ),
           ),
           new SizedBox(
             height: 20.0,
diff --git a/pubspec.yaml b/pubspec.yaml
index f76392a8..e5c6f5cf 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,8 +6,8 @@ homepage: https://github.com/wilburt/flutter_paystack
 dependencies:
   flutter:
     sdk: flutter
-  http: ^0.13.5
-  intl: ^0.17.0
+  http: '>=0.13.5'
+  intl: '>=0.17.0'
   meta: ^1.8.0
   async: ^2.9.0
 
@@ -34,4 +34,4 @@ flutter:
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
-  flutter: ">=2.0.0"
\ No newline at end of file
+  flutter: ">=2.0.0"