diff --git a/example/lib/main.dart b/example/lib/main.dart
index 87a7123e..55075ef5 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -156,7 +156,7 @@ class _HomePageState extends State<HomePage> {
                     primaryColorLight: Colors.white,
                     primaryColorDark: navyBlue,
                     textTheme: Theme.of(context).textTheme.copyWith(
-                          bodyText2: TextStyle(
+                          bodyMedium: TextStyle(
                             color: lightBlue,
                           ),
                         ),
diff --git a/lib/src/widgets/birthday_widget.dart b/lib/src/widgets/birthday_widget.dart
index 20449a42..083db57e 100644
--- a/lib/src/widgets/birthday_widget.dart
+++ b/lib/src/widgets/birthday_widget.dart
@@ -45,7 +45,7 @@ class _BirthdayWidgetState extends BaseState<BirthdayWidget> {
               textAlign: TextAlign.center,
               style: TextStyle(
                 fontWeight: FontWeight.w500,
-                color: context.textTheme().headline6?.color,
+                color: context.textTheme().headlineSmall?.color,
                 fontSize: 15.0,
               ),
             ),
diff --git a/lib/src/widgets/checkout/checkout_widget.dart b/lib/src/widgets/checkout/checkout_widget.dart
index 6e467620..33ab06e7 100644
--- a/lib/src/widgets/checkout/checkout_widget.dart
+++ b/lib/src/widgets/checkout/checkout_widget.dart
@@ -188,7 +188,7 @@ class _CheckoutWidgetState extends BaseState<CheckoutWidget>
               Text(
                 'Pay',
                 style: TextStyle(
-                    fontSize: 14.0, color: context.textTheme().headline1?.color),
+                    fontSize: 14.0, color: context.textTheme().headlineLarge?.color),
               ),
               SizedBox(
                 width: 5.0,
@@ -197,7 +197,7 @@ class _CheckoutWidgetState extends BaseState<CheckoutWidget>
                   child: Text(Utils.formatAmount(_charge.amount),
                       style: TextStyle(
                           fontSize: 15.0,
-                          color: context.textTheme().headline6?.color,
+                          color: context.textTheme().headlineSmall?.color,
                           fontWeight: FontWeight.bold)))
             ],
           )
diff --git a/lib/src/widgets/custom_dialog.dart b/lib/src/widgets/custom_dialog.dart
index 4faa5333..6248f7b4 100644
--- a/lib/src/widgets/custom_dialog.dart
+++ b/lib/src/widgets/custom_dialog.dart
@@ -33,7 +33,7 @@ class CustomAlertDialog extends StatelessWidget {
       children.add(new Padding(
         padding: titlePadding!,
         child: new DefaultTextStyle(
-          style: context.textTheme().headline6!,
+          style: context.textTheme().headlineSmall!,
           child: new Semantics(child: title, namesRoute: true),
         ),
       ));
@@ -43,7 +43,7 @@ class CustomAlertDialog extends StatelessWidget {
       child: new Padding(
         padding: contentPadding,
         child: new DefaultTextStyle(
-          style: context.textTheme().subtitle1!,
+          style: context.textTheme().displaySmall!,
           child: content,
         ),
       ),
diff --git a/lib/src/widgets/otp_widget.dart b/lib/src/widgets/otp_widget.dart
index f0f74a70..af88d487 100644
--- a/lib/src/widgets/otp_widget.dart
+++ b/lib/src/widgets/otp_widget.dart
@@ -42,7 +42,7 @@ class _OtpWidgetState extends BaseState<OtpWidget> {
                   textAlign: TextAlign.center,
                   style:  TextStyle(
                     fontWeight: FontWeight.w500,
-                    color: context.textTheme().headline6?.color,
+                    color: context.textTheme().headlineSmall?.color,
                     fontSize: 15.0,
                   ),
                 ),
diff --git a/lib/src/widgets/pin_widget.dart b/lib/src/widgets/pin_widget.dart
index 124dabd8..1a4aa828 100644
--- a/lib/src/widgets/pin_widget.dart
+++ b/lib/src/widgets/pin_widget.dart
@@ -38,7 +38,7 @@ class _PinWidgetState extends BaseState<PinWidget> {
                 textAlign: TextAlign.center,
                 style: TextStyle(
                   fontWeight: FontWeight.w500,
-                  color: context.textTheme().headline6?.color,
+                  color: context.textTheme().headlineSmall?.color,
                   fontSize: 15.0,
                 ),
               ),
diff --git a/lib/src/widgets/sucessful_widget.dart b/lib/src/widgets/sucessful_widget.dart
index dc669431..e8e64d0f 100644
--- a/lib/src/widgets/sucessful_widget.dart
+++ b/lib/src/widgets/sucessful_widget.dart
@@ -86,7 +86,7 @@ class _SuccessfulWidgetState extends State<SuccessfulWidget>
             Text(
               'Payment Successful',
               style: TextStyle(
-                color: context.textTheme().headline6?.color,
+                color: context.textTheme().headlineSmall?.color,
                 fontWeight: FontWeight.w500,
                 fontSize: 16.0,
               ),
@@ -98,7 +98,7 @@ class _SuccessfulWidgetState extends State<SuccessfulWidget>
                 ? new Container()
                 : new Text('You paid ${Utils.formatAmount(widget.amount)}',
                     style: TextStyle(
-                      color: context.textTheme().headline6?.color,
+                      color: context.textTheme().headlineSmall?.color,
                       fontWeight: FontWeight.normal,
                       fontSize: 14.0,
                     )),
diff --git a/pubspec.yaml b/pubspec.yaml
index f76392a8..9b7f2cf0 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: ^1.0.0
+  intl: ^0.19.0
   meta: ^1.8.0
   async: ^2.9.0