diff --git a/.gitignore b/.gitignore
index 65c34dc..de71c2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,6 @@ build/
 # Omit committing pubspec.lock for library packages; see
 # https://dart.dev/guides/libraries/private-files#pubspeclock.
 pubspec.lock
+
+# Local overrides of pub packages. 
+pubspec_overrides.yaml
\ No newline at end of file
diff --git a/packages/flutter_ioc_get_it/example/pubspec.yaml b/packages/flutter_ioc_get_it/example/pubspec.yaml
index 3ff694b..dd87ce8 100644
--- a/packages/flutter_ioc_get_it/example/pubspec.yaml
+++ b/packages/flutter_ioc_get_it/example/pubspec.yaml
@@ -9,4 +9,4 @@ dependencies:
     path: ../../flutter_ioc_get_it
 
 environment:
-  sdk: '>=2.18.1 <3.0.0'
\ No newline at end of file
+  sdk: '>=2.18.1 <4.0.0'
\ No newline at end of file
diff --git a/packages/flutter_ioc_get_it/lib/src/ioc_container.dart b/packages/flutter_ioc_get_it/lib/src/ioc_container.dart
index b351cdc..bbaeb29 100644
--- a/packages/flutter_ioc_get_it/lib/src/ioc_container.dart
+++ b/packages/flutter_ioc_get_it/lib/src/ioc_container.dart
@@ -75,14 +75,20 @@ class GetItIocContainer extends IocContainer {
 
   @override
   FutureOr<void> resetLazySingleton<T extends Object>({
-    Object? instance,
+    T? instance,
     String? instanceName,
     FutureOr<void> Function(T)? onDispose,
   }) =>
       _container.resetLazySingleton(
         instance: instance,
         instanceName: instanceName,
-        disposingFunction: onDispose,
+        disposingFunction: (T instance) {
+          if (onDispose == null) {
+            return null;
+          }
+
+          return onDispose(instance);
+        },
       );
 
   @override
diff --git a/packages/flutter_ioc_get_it/pubspec.yaml b/packages/flutter_ioc_get_it/pubspec.yaml
index 1b9ecb3..3815298 100644
--- a/packages/flutter_ioc_get_it/pubspec.yaml
+++ b/packages/flutter_ioc_get_it/pubspec.yaml
@@ -1,11 +1,11 @@
 name: flutter_ioc_get_it
 description: An implementation of the flutter_ioc package based on get_it.
-version: 1.0.0
+version: 1.2.0
 
 publish_to: none
 
 environment:
-  sdk: '>=2.18.1 <3.0.0'
+  sdk: '>=2.18.1 <4.0.0'
 
 dependencies:
   flutter_ioc:
@@ -13,7 +13,7 @@ dependencies:
       url: https://github.com/baseflow/flutter_ioc
       path: packages/flutter_ioc
       ref: flutter_ioc_v2.0.0
-  get_it: ^7.2.0
+  get_it: ^7.6.4
 
 dev_dependencies:
   lints: ^2.0.0