diff --git a/ios/Runner.xcodeproj/project.pbxproj b/ios/Runner.xcodeproj/project.pbxproj
index da30da7ef..51d11dae5 100644
--- a/ios/Runner.xcodeproj/project.pbxproj
+++ b/ios/Runner.xcodeproj/project.pbxproj
@@ -354,7 +354,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEVELOPMENT_TEAM = 32J6BB6VUS;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -494,7 +494,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEVELOPMENT_TEAM = 32J6BB6VUS;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -528,7 +528,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEVELOPMENT_TEAM = 32J6BB6VUS;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
diff --git a/lib/exchange/xmrto/xmrto_exchange_provider.dart b/lib/exchange/xmrto/xmrto_exchange_provider.dart
index 26adaedef..cc63ff1a3 100644
--- a/lib/exchange/xmrto/xmrto_exchange_provider.dart
+++ b/lib/exchange/xmrto/xmrto_exchange_provider.dart
@@ -27,11 +27,14 @@ class XMRTOExchangeProvider extends ExchangeProvider {
   static const _orderParameterUriSuffix = '/order_parameter_query';
   static const _orderStatusUriSuffix = '/order_status_query/';
   static const _orderCreateUriSuffix = '/order_create/';
+  static const _headers = {
+    'Content-Type': 'application/json',
+    'User-Agent': userAgent
+  };
 
   static Future<bool> _checkIsAvailable() async {
     const url = originalApiUri + _orderParameterUriSuffix;
-    final response =
-        await get(url, headers: {'Content-Type': 'application/json'});
+    final response = await get(url, headers: _headers);
     return !(response.statusCode == 403);
   }
 
@@ -91,9 +94,8 @@ class XMRTOExchangeProvider extends ExchangeProvider {
   Future<Trade> createTrade({TradeRequest request}) async {
     final _request = request as XMRTOTradeRequest;
     final url = originalApiUri + _orderCreateUriSuffix;
-    final _amount = _request.isBTCRequest
-        ? _request.receiveAmount
-        : _request.amount;
+    final _amount =
+        _request.isBTCRequest ? _request.receiveAmount : _request.amount;
 
     final _amountCurrency = _request.isBTCRequest
         ? _request.to.toString()
@@ -112,8 +114,8 @@ class XMRTOExchangeProvider extends ExchangeProvider {
       'amount_currency': _amountCurrency,
       'btc_dest_address': _request.address
     };
-    final response = await post(url,
-        headers: {'Content-Type': 'application/json'}, body: json.encode(body));
+    final response =
+        await post(url, headers: _headers, body: json.encode(body));
 
     if (response.statusCode != 201) {
       if (response.statusCode == 400) {
@@ -141,13 +143,10 @@ class XMRTOExchangeProvider extends ExchangeProvider {
 
   @override
   Future<Trade> findTradeById({@required String id}) async {
-    const headers = {
-      'Content-Type': 'application/json',
-      'User-Agent': userAgent
-    };
     final url = originalApiUri + _orderStatusUriSuffix;
     final body = {'uuid': id};
-    final response = await post(url, headers: headers, body: json.encode(body));
+    final response =
+        await post(url, headers: _headers, body: json.encode(body));
 
     if (response.statusCode != 200) {
       if (response.statusCode == 400) {
@@ -210,8 +209,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
   Future<double> _fetchRates() async {
     try {
       final url = originalApiUri + _orderParameterUriSuffix;
-      final response =
-          await get(url, headers: {'Content-Type': 'application/json'});
+      final response = await get(url, headers: _headers);
       final responseJSON = json.decode(response.body) as Map<String, dynamic>;
       final price = double.parse(responseJSON['price'] as String);
 
diff --git a/pubspec.yaml b/pubspec.yaml
index a4b35f14a..b05bfdbfc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,7 @@ description: Cake Wallet.
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 4.0.9+21
+version: 4.0.91+22
 
 environment:
   sdk: ">=2.7.0 <3.0.0"