diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,6 +1,9 @@
 # GodotHook
  A lite custom event system for Godot Engine
  
+## Notes
+- All method names was changed to lowercase (`hook.Add` -> `hook.add`). For old naming use `4.x-capital-literals` branch.
+ 
 ## Supported versions
 | Godot version | Supported | Branch |
 | - | - | - |