diff --git a/lib/coingecko_dart.dart b/lib/coingecko_dart.dart
index 5230f8c..afff534 100644
--- a/lib/coingecko_dart.dart
+++ b/lib/coingecko_dart.dart
@@ -58,8 +58,8 @@ class CoinGeckoApi {
       bool enableLogging = true}) {
     var options = BaseOptions(
         baseUrl: 'https://api.coingecko.com/api/v3',
-        connectTimeout: connectTimeout,
-        receiveTimeout: receiveTimeout,
+        connectTimeout: Duration(milliseconds: connectTimeout),
+        receiveTimeout: Duration(milliseconds: receiveTimeout),
         validateStatus: (code) => true,
         responseType: ResponseType.json);
     dio = Dio(options);
@@ -179,13 +179,12 @@ class CoinGeckoApi {
   }
 
   // ? /coins/{id}/ohlc
-  Future<CoinGeckoResult<dynamic>> ohlc(
-      {required String id,
-        required List<String> vs_currencies,
-        required int days,}) async {
-
-    Response response =
-    await dio!.get('/coins/$id/ohlc', queryParameters: {
+  Future<CoinGeckoResult<dynamic>> ohlc({
+    required String id,
+    required List<String> vs_currencies,
+    required int days,
+  }) async {
+    Response response = await dio!.get('/coins/$id/ohlc', queryParameters: {
       "vs_currency": vs_currencies.join(','),
       "days": days,
     });
@@ -278,7 +277,8 @@ class CoinGeckoApi {
       queryParams['category'] = category.asString;
     if (coinIds.isNotEmpty) queryParams['ids'] = coinIds.join(',');
     if (priceChangePercentage.isNotEmpty)
-      queryParams['price_change_percentage'] = priceChangePercentage.map((e)=>e.asString).join(',');
+      queryParams['price_change_percentage'] =
+          priceChangePercentage.map((e) => e.asString).join(',');
     Response response =
         await dio!.get('/coins/markets', queryParameters: queryParams);
 
@@ -708,7 +708,7 @@ enum ChartTimeInterval { MINUTELY, HOURLY, DAILY, EMPTY }
 
 enum MarketInterval { T_1H, T_24H, T_7D, T_14D, T_30D, T_200D, T_1Y }
 
-extension MarketIntervalExt on MarketInterval{
+extension MarketIntervalExt on MarketInterval {
   String get asString => this.toString().substring(2).toLowerCase();
 }
 
diff --git a/lib/dataClasses/coins/CoinDataPoint.dart b/lib/dataClasses/coins/CoinDataPoint.dart
index dcaddad..b9999d7 100644
--- a/lib/dataClasses/coins/CoinDataPoint.dart
+++ b/lib/dataClasses/coins/CoinDataPoint.dart
@@ -1,7 +1,6 @@
 
 
 import 'package:coingecko_dart/helperClass/staticHelpers.dart';
-import 'package:intl/intl.dart';
 
 class CoinDataPoint{
   DateTime? date;
diff --git a/lib/dataClasses/coins/PricedCoinBase.dart b/lib/dataClasses/coins/PricedCoinBase.dart
index 47d260d..105ef5f 100644
--- a/lib/dataClasses/coins/PricedCoinBase.dart
+++ b/lib/dataClasses/coins/PricedCoinBase.dart
@@ -1,4 +1,3 @@
-import 'Coin.dart';
 
 class PricedCoinBase {
   Map<String, double> data = Map();
diff --git a/lib/dataClasses/contracts/ContractToken.dart b/lib/dataClasses/contracts/ContractToken.dart
index dda321b..679838f 100644
--- a/lib/dataClasses/contracts/ContractToken.dart
+++ b/lib/dataClasses/contracts/ContractToken.dart
@@ -1,6 +1,5 @@
 
 
-import 'package:coingecko_dart/dataClasses/coins/Coin.dart';
 
 class ContractToken {
 
diff --git a/pubspec.lock b/pubspec.lock
index 5668b03..a8ddf06 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,358 +5,409 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      url: "https://pub.dartlang.org"
+      sha256: "8b26d8e753b98993955468cd075183ee939ff0e469d1cf10cac65016bef84234"
+      url: "https://pub.dev"
     source: hosted
     version: "20.0.0"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
-      url: "https://pub.dartlang.org"
+      sha256: "346050e5510127216a4b6da619cc05b1147e0380e1f00f8b7596ff77dc462053"
+      url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
   args:
     dependency: transitive
     description:
       name: args
-      url: "https://pub.dartlang.org"
+      sha256: "37a4264b0b7fb930e94c0c47558f3b6c4f4e9cb7e655a3ea373131d79b2dc0cc"
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
   async:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.5.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
+      sha256: "5bbf32bc9e518d41ec49718e2931cd4527292c9b0c6d2dffcf7fe6b9a8a8cf72"
+      url: "https://pub.dev"
     source: hosted
     version: "2.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
-      url: "https://pub.dartlang.org"
+      sha256: "8e36feea6de5ea69f2199f29cf42a450a855738c498b57c0b980e2d3cca9c362"
+      url: "https://pub.dev"
     source: hosted
     version: "1.2.0"
   cli_util:
     dependency: transitive
     description:
       name: cli_util
-      url: "https://pub.dartlang.org"
+      sha256: cf1c02840bbbcf8fcd13feb5933c62d643cc58ddf4f6088707cf48d1892cbc5d
+      url: "https://pub.dev"
     source: hosted
     version: "0.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.dartlang.org"
+      sha256: "6021e0172ab6e6eaa1d391afed0a99353921f00c54385c574dc53e55d67c092c"
+      url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.dartlang.org"
+      sha256: "6d4193120997ecfd09acf0e313f13dc122b119e5eca87ef57a7d065ec9183762"
+      url: "https://pub.dev"
     source: hosted
     version: "1.15.0"
   convert:
     dependency: transitive
     description:
       name: convert
-      url: "https://pub.dartlang.org"
+      sha256: df567b950053d83b4dba3e8c5799c411895d146f82b2147114b666a4fd9a80dd
+      url: "https://pub.dev"
     source: hosted
     version: "3.0.0"
   coverage:
     dependency: transitive
     description:
       name: coverage
-      url: "https://pub.dartlang.org"
+      sha256: "2890d8a09829de2cc3ead1407960549e4eb3c4e48c8fb837bfa5c68398496489"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.2"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      url: "https://pub.dartlang.org"
+      sha256: cf75650c66c0316274e21d7c43d3dea246273af5955bd94e8184837cd577575c
+      url: "https://pub.dev"
     source: hosted
     version: "3.0.1"
   dio:
     dependency: "direct main"
     description:
       name: dio
-      url: "https://pub.dartlang.org"
+      sha256: "11e40df547d418cc0c4900a9318b26304e665da6fa4755399a9ff9efd09034b5"
+      url: "https://pub.dev"
     source: hosted
-    version: "4.0.0"
+    version: "5.4.3+1"
   file:
     dependency: transitive
     description:
       name: file
-      url: "https://pub.dartlang.org"
+      sha256: "9fd2163d866769f60f4df8ac1dc59f52498d810c356fe78022e383dd3c57c0e1"
+      url: "https://pub.dev"
     source: hosted
     version: "6.1.0"
   glob:
     dependency: transitive
     description:
       name: glob
-      url: "https://pub.dartlang.org"
+      sha256: dda85ce2aefce16f7e75586acbcb1e8320bf176f69fd94082e31945d6de67f3e
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.1"
   http_multi_server:
     dependency: transitive
     description:
       name: http_multi_server
-      url: "https://pub.dartlang.org"
+      sha256: bfb651625e251a88804ad6d596af01ea903544757906addcb2dcdf088b5ea185
+      url: "https://pub.dev"
     source: hosted
     version: "3.0.1"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
-      url: "https://pub.dartlang.org"
+      sha256: e362d639ba3bc07d5a71faebb98cde68c05bfbcfbbb444b60b6f60bb67719185
+      url: "https://pub.dev"
     source: hosted
     version: "4.0.0"
   intl:
     dependency: "direct main"
     description:
       name: intl
-      url: "https://pub.dartlang.org"
+      sha256: d6f56758b7d3014a48af9701c085700aac781a92a87a62b1333b46d8879661cf
+      url: "https://pub.dev"
     source: hosted
-    version: "0.17.0"
+    version: "0.19.0"
   io:
     dependency: transitive
     description:
       name: io
-      url: "https://pub.dartlang.org"
+      sha256: "15a5436d2a02dc60e6dc2fb5d7dfaac08b7b137cff3d4bf3158d38ecab656b69"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
   js:
     dependency: transitive
     description:
       name: js
-      url: "https://pub.dartlang.org"
+      sha256: d9bdfd70d828eeb352390f81b18d6a354ef2044aa28ef25682079797fa7cd174
+      url: "https://pub.dev"
     source: hosted
     version: "0.6.3"
   logging:
     dependency: transitive
     description:
       name: logging
-      url: "https://pub.dartlang.org"
+      sha256: "0520a4826042a8a5d09ddd4755623a50d37ee536d79a70452aff8c8ad7bb6c27"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.dartlang.org"
+      sha256: "38c7be344ac5057e10161a5ecb00c9d9d67ed2f150001278601dd27d9fe64206"
+      url: "https://pub.dev"
     source: hosted
     version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.dartlang.org"
+      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
+    version: "1.15.0"
   mime:
     dependency: transitive
     description:
       name: mime
-      url: "https://pub.dartlang.org"
+      sha256: a7a98ea7f366e2cc9d2b20873815aebec5e2bc124fe0da9d3f7f59b0625ea180
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
   node_preamble:
     dependency: transitive
     description:
       name: node_preamble
-      url: "https://pub.dartlang.org"
+      sha256: c133f761a6a790d0b000efa4f74eae9700bb6e9e9f5e996f0e8d6fe92703ced6
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
   package_config:
     dependency: transitive
     description:
       name: package_config
-      url: "https://pub.dartlang.org"
+      sha256: "20e7154d701fedaeb219dad732815ecb66677667871127998a9a6581c2aba4ba"
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.dartlang.org"
+      sha256: "2ad4cddff7f5cc0e2d13069f2a3f7a73ca18f66abd6f5ecf215219cdb3638edb"
+      url: "https://pub.dev"
     source: hosted
     version: "1.8.0"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
-      url: "https://pub.dartlang.org"
+      sha256: "8f6460c77a98ad2807cd3b98c67096db4286f56166852d0ce5951bb600a63594"
+      url: "https://pub.dev"
     source: hosted
     version: "1.11.0"
   pool:
     dependency: transitive
     description:
       name: pool
-      url: "https://pub.dartlang.org"
+      sha256: "05955e3de2683e1746222efd14b775df7131139e07695dc8e24650f6b4204504"
+      url: "https://pub.dev"
     source: hosted
     version: "1.5.0"
   pub_semver:
     dependency: transitive
     description:
       name: pub_semver
-      url: "https://pub.dartlang.org"
+      sha256: "59ed538734419e81f7fc18c98249ae72c3c7188bdd9dceff2840585227f79843"
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
   quiver:
     dependency: "direct main"
     description:
       name: quiver
-      url: "https://pub.dartlang.org"
+      sha256: "5e592c348a6c528fb8deb7cc7d85a7097ce65bf2349121ad004d1fc5d5905eaa"
+      url: "https://pub.dev"
     source: hosted
     version: "3.0.1"
   shelf:
     dependency: transitive
     description:
       name: shelf
-      url: "https://pub.dartlang.org"
+      sha256: c2f658d28ec86857657dec3579e2db4dc5a6c477b6aecde870e77f0682258901
+      url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
   shelf_packages_handler:
     dependency: transitive
     description:
       name: shelf_packages_handler
-      url: "https://pub.dartlang.org"
+      sha256: e0b44ebddec91e70a713e13adf93c1b2100821303b86a18e1ef1d082bd8bd9b8
+      url: "https://pub.dev"
     source: hosted
     version: "3.0.0"
   shelf_static:
     dependency: transitive
     description:
       name: shelf_static
-      url: "https://pub.dartlang.org"
+      sha256: "8584c0aa0f5756a61519b1a2fc2cd22ddbc518e9396bd33ebf06b9836bb23d13"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
-      url: "https://pub.dartlang.org"
+      sha256: fd84910bf7d58db109082edf7326b75322b8f186162028482f53dc892f00332d
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.1"
   source_map_stack_trace:
     dependency: transitive
     description:
       name: source_map_stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: "8c463326277f68a628abab20580047b419c2ff66756fd0affd451f73f9508c11"
+      url: "https://pub.dev"
     source: hosted
     version: "2.1.0"
   source_maps:
     dependency: transitive
     description:
       name: source_maps
-      url: "https://pub.dartlang.org"
+      sha256: "52de2200bb098de739794c82d09c41ac27b2e42fd7e23cce7b9c74bf653c7296"
+      url: "https://pub.dev"
     source: hosted
     version: "0.10.10"
   source_span:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: f4b22294de9a549967d0033d4f30fcad4f0afc200f4bf58e82d815725feec70c
+      url: "https://pub.dev"
     source: hosted
     version: "1.8.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: f8d9f247e2f9f90e32d1495ff32dac7e4ae34ffa7194c5ff8fcc0fd0e52df774
+      url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: db47e4797198ee601990820437179bb90219f918962318d494ada2b4b11e6f6d
+      url: "https://pub.dev"
     source: hosted
     version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: dd11571b8a03f7cadcf91ec26a77e02bfbd6bbba2a512924d3116646b4198fc4
+      url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
+      sha256: a88162591b02c1f3a3db3af8ce1ea2b374bd75a7bb8d5e353bcfbdc79d719830
+      url: "https://pub.dev"
     source: hosted
     version: "1.2.0"
   test:
     dependency: "direct main"
     description:
       name: test
-      url: "https://pub.dartlang.org"
+      sha256: "51bed717b867dd91d75b804c8abbfb30cf904d30c00bea3d5467f3c3c7d4e064"
+      url: "https://pub.dev"
     source: hosted
     version: "1.16.8"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: "9ddd24ec429417cfffd744115508a95f0ee956ec02a2d972dd7fbfbfe047cf45"
+      url: "https://pub.dev"
     source: hosted
     version: "0.3.0"
   test_core:
     dependency: transitive
     description:
       name: test_core
-      url: "https://pub.dartlang.org"
+      sha256: "9567514cac32e25165c78bd2c98092b3f7fd5a1555114b4f08d83830d6645e33"
+      url: "https://pub.dev"
     source: hosted
     version: "0.3.19"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      url: "https://pub.dartlang.org"
+      sha256: "53bdf7e979cfbf3e28987552fd72f637e63f3c8724c9e56d9246942dc2fa36ee"
+      url: "https://pub.dev"
     source: hosted
     version: "1.3.0"
   vm_service:
     dependency: transitive
     description:
       name: vm_service
-      url: "https://pub.dartlang.org"
+      sha256: "422eda09e2a50eb27fe9eca2c897d624cea7fa432a8442e1ea1a10d50a4321ab"
+      url: "https://pub.dev"
     source: hosted
     version: "6.2.0"
   watcher:
     dependency: transitive
     description:
       name: watcher
-      url: "https://pub.dartlang.org"
+      sha256: "68173f2fa67d241323a4123be7ed4e43424c54befa5505d71c8ad4b7baf8f71d"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
   web_socket_channel:
     dependency: transitive
     description:
       name: web_socket_channel
-      url: "https://pub.dartlang.org"
+      sha256: "500e6014efebd305a30ebf1c6006d13faa82dcd85c7a2a7793679a64ed69ec48"
+      url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
   webkit_inspection_protocol:
     dependency: transitive
     description:
       name: webkit_inspection_protocol
-      url: "https://pub.dartlang.org"
+      sha256: "5adb6ab8ed14e22bb907aae7338f0c206ea21e7a27004e97664b16c120306f00"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
   yaml:
     dependency: transitive
     description:
       name: yaml
-      url: "https://pub.dartlang.org"
+      sha256: "3cee79b1715110341012d27756d9bae38e650588acd38d3f3c610822e1337ace"
+      url: "https://pub.dev"
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=3.0.0 <4.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index dc5a22a..7adfe21 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -7,7 +7,7 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  dio: ^4.0.0
-  intl: ^0.17.0
+  dio: ^5.4.3+1
+  intl: ^0.19.0
   quiver: ^3.0.1
   test: ^1.16.0
diff --git a/test/just_dart.dart b/test/just_dart.dart
index 31bf694..d2e2bd9 100644
--- a/test/just_dart.dart
+++ b/test/just_dart.dart
@@ -1,8 +1,6 @@
 
 import 'package:coingecko_dart/coingecko_dart.dart';
-import 'package:intl/intl.dart';
 import 'package:test/test.dart';
-import 'dart:io';
 
 void main()
 {