diff --git a/package.json b/package.json
index f83eb55a..253c42a4 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "jsdom": "^9.5.0",
     "sinon": "^1.17.6",
     "tslint": "^5.2.0",
-    "typescript": "~2.3.2"
+    "typescript": "~2.4.1"
   },
   "dependencies": {
     "maquette": "~2.5.1",
diff --git a/src/Injector.ts b/src/Injector.ts
index ab3fc033..56727869 100644
--- a/src/Injector.ts
+++ b/src/Injector.ts
@@ -15,11 +15,11 @@ import {
 import RegistryHandler from './RegistryHandler';
 
 export interface GetProperties {
-	<C, P extends WidgetProperties>(inject: C, properties: P): any;
+	<P extends WidgetProperties>(inject: any, properties: P): any;
 }
 
 export interface GetChildren {
-	<C>(inject: C, children: DNode[]): DNode[];
+	(inject: any, children: DNode[]): DNode[];
 }
 
 /**
diff --git a/src/interfaces.d.ts b/src/interfaces.d.ts
index 897beac1..816da25c 100644
--- a/src/interfaces.d.ts
+++ b/src/interfaces.d.ts
@@ -304,7 +304,7 @@ export interface PropertyChangeRecord {
 }
 
 export interface DiffPropertyFunction {
-	<T>(previousProperty: T, newProperty: any): PropertyChangeRecord;
+	(previousProperty: any, newProperty: any): PropertyChangeRecord;
 }
 
 export interface DiffPropertyReaction {