diff --git a/README.md b/README.md
index 709a7ddf..3ae84724 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # angel_framework
 
-[![pub 1.0.0-dev.58](https://img.shields.io/badge/pub-1.0.0--dev.58-red.svg)](https://pub.dartlang.org/packages/angel_framework)
+[![pub 1.0.0-dev.59](https://img.shields.io/badge/pub-1.0.0--dev.59-red.svg)](https://pub.dartlang.org/packages/angel_framework)
 [![build status](https://travis-ci.org/angel-dart/framework.svg)](https://travis-ci.org/angel-dart/framework)
 
 Core libraries for the Angel Framework.
diff --git a/lib/src/http/request_context.dart b/lib/src/http/request_context.dart
index 1976f23b..23dc7284 100644
--- a/lib/src/http/request_context.dart
+++ b/lib/src/http/request_context.dart
@@ -103,7 +103,7 @@ class RequestContext extends Extensible {
   /// Grabs an object by key or type from [params], [injections], or
   /// [app].container. Use this to perform dependency injection
   /// within a service hook.
-  grab(key) {
+  T grab<T>(key) {
     if (params.containsKey(key))
       return params[key];
     else if (injections.containsKey(key))
diff --git a/lib/src/http/server.dart b/lib/src/http/server.dart
index be412695..014c443b 100644
--- a/lib/src/http/server.dart
+++ b/lib/src/http/server.dart
@@ -27,9 +27,6 @@ typedef Future AngelErrorHandler(
 /// A function that configures an [Angel] server in some way.
 typedef Future AngelConfigurer(Angel app);
 
-/// A function that takes no parameters.
-typedef ParameterlessFunction();
-
 /// A powerful real-time/REST/MVC server class.
 class Angel extends AngelBase {
   StreamController<HttpRequest> _afterProcessed =
@@ -491,10 +488,11 @@ class Angel extends AngelBase {
 /// Predetermines what needs to be injected for a handler to run.
 InjectionRequest preInject(Function handler) {
   var injection = new InjectionRequest();
-  if (handler is ParameterlessFunction) return injection;
 
   ClosureMirror closureMirror = reflect(handler);
 
+  if (closureMirror.function.parameters.isEmpty) return injection;
+
   // Load parameters
   for (var parameter in closureMirror.function.parameters) {
     var name = MirrorSystem.getName(parameter.simpleName);
diff --git a/pubspec.yaml b/pubspec.yaml
index dba3746a..15af350d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: angel_framework
-version: 1.0.0-dev.58
+version: 1.0.0-dev.59
 description: Core libraries for the Angel framework.
 author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/angel_framework