diff --git a/CHANGELOG.md b/CHANGELOG.md
index e10ffc2..30ce3e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 2.0.1
+* Migrated to null safety
+
 # 0.1.2
 * Fixing the changelog version titles
 
diff --git a/lib/twitter_api.dart b/lib/twitter_api.dart
index aa8c9a1..9fb5f45 100644
--- a/lib/twitter_api.dart
+++ b/lib/twitter_api.dart
@@ -134,7 +134,7 @@ class twitterApi {
   /// 
   /// The twitter developer website also goes into detail about [options] that can
   /// be applied. These [options] are of type Map<String, String>.
-  getTwitterRequest(String method, String url, {Map<String, String> options, int timeout = 10}) async {
+  getTwitterRequest(String method, String url, {Map<String, String>? options, int timeout = 10}) async {
     if(options == null) options = {};
 
     // Create the nonce
@@ -148,7 +148,7 @@ class twitterApi {
     var authHeader = _getOauthHeader();
 
     // The response from the request
-    Future response;
+    Future? response;
 
     // Add a post and get option
     if(method.toUpperCase() == "GET")
diff --git a/pubspec.yaml b/pubspec.yaml
index 7ed5529..f2c6e94 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,12 +1,11 @@
 name: twitter_api
-version: 0.1.2
-author: "Dart Team <misc@dartlang.org>"
+version: 1.0.1
 homepage: https://github.com/stefanuros/dartTwitterAPI
 description: An easy way to authenticate and make requests to the Twitter API.
 
 environment:
-  sdk: '>=2.1.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  http: ^0.12.0+2
-  crypto: ^2.1.3
+  http: ^0.13.4
+  crypto: ^3.0.1