diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5ce0ed4..a5f08002 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 3.0.1
+* Make the callback in `Router.group` generically-typed.
+
 # 3.0.0
 * Make `Router` and `Route` single-parameter generic.
 * Remove `package:browser` dependency.
diff --git a/lib/src/router.dart b/lib/src/router.dart
index 6e9d91ac..d24c97fe 100644
--- a/lib/src/router.dart
+++ b/lib/src/router.dart
@@ -35,8 +35,8 @@ class Router<T> {
 
   List<T> get middleware => new List<T>.unmodifiable(_middleware);
 
-  Map<Pattern, Router> get mounted =>
-      new Map<Pattern, Router>.unmodifiable(_mounted);
+  Map<Pattern, Router<T>> get mounted =>
+      new Map<Pattern, Router<T>>.unmodifiable(_mounted);
 
   List<Route<T>> get routes {
     return _routes.fold<List<Route<T>>>([], (out, route) {
@@ -163,7 +163,7 @@ class Router<T> {
   ///
   /// Returns the created route.
   /// You can also register middleware within the router.
-  SymlinkRoute<T> group(String path, void callback(Router router),
+  SymlinkRoute<T> group(String path, void callback(Router<T> router),
       {Iterable<T> middleware: const [], String name: null}) {
     final router = new Router<T>().._middleware.addAll(middleware);
     callback(router);
diff --git a/pubspec.yaml b/pubspec.yaml
index 34ce7553..1be494f0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: angel_route
 description: A powerful, isomorphic routing library for Dart. It is mainly used in the Angel framework, but can be used in Flutter and on the Web.
-version: 3.0.0
+version: 3.0.1
 author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/angel_route
 environment: