diff --git a/Libraries/Sources/DependencyService/Protocols/DependencyKey.swift b/Libraries/Sources/DependencyService/Protocols/DependencyKey.swift
new file mode 100644
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+++ b/Libraries/Sources/DependencyService/Protocols/DependencyKey.swift
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+//
+//  DependencyKey.swift
+//  DependencyService
+//
+//  Created by Javier Cicchelli on 05/12/2022.
+//  Copyright © 2022 Röck+Cöde. All rights reserved.
+//
+
+public protocol DependencyKey {
+
+    // MARK: Associated types
+
+    associatedtype Value
+    
+    // MARK: Properties
+    
+    static var currentValue: Value { get set }
+    
+}