diff --git a/activations.py b/activations.py
index fa2a6d9..5b1d061 100644
--- a/activations.py
+++ b/activations.py
@@ -25,3 +25,11 @@ class LeakyReLU(ActivationFunc):
 
     def derivative(self, x):
         return (x > 0) + self.k * (x <= 0)
+
+
+class Identity(ActivationFunc):
+    def __call__(self, x):
+        return x
+
+    def derivative(x):
+        return 1