diff --git a/Game/Behaviours/KeyboardInputsBehaviour.cs b/Game/Behaviours/KeyboardInputsBehaviour.cs
index 86d9351..19ac30d 100644
--- a/Game/Behaviours/KeyboardInputsBehaviour.cs
+++ b/Game/Behaviours/KeyboardInputsBehaviour.cs
@@ -9,8 +9,8 @@ namespace Pong.Behaviours;
 
 public class KeyboardInputsBehaviour : BehaviourOverride, IButtonInputs<Keys>
 {
-    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>> OnPressed = new(256);
-    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>> OnReleased = new(256);
+    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>?> OnPressed = new(256);
+    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>?> OnReleased = new(256);
 
     private int cachePressedCurrentlyCount = 0;
     private readonly Keys[] cachePressedCurrently = new Keys[256];
@@ -68,7 +68,7 @@ public class KeyboardInputsBehaviour : BehaviourOverride, IButtonInputs<Keys>
             if (WasPressed(currentlyPressedKey))
                 continue;
 
-            action.Invoke(this, currentlyPressedKey);
+            action?.Invoke(this, currentlyPressedKey);
         }
 
         for (int i = 0; i < cachePressedPreviouslyCount; i++)
@@ -81,7 +81,7 @@ public class KeyboardInputsBehaviour : BehaviourOverride, IButtonInputs<Keys>
             if (IsPressed(previouslyPressedKey))
                 continue;
 
-            action.Invoke(this, previouslyPressedKey);
+            action?.Invoke(this, previouslyPressedKey);
         }
 
         Array.Copy(cachePressedCurrently, cachePressedPreviously, cachePressedCurrentlyCount);