diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index b9819303..c3baf309 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,9 +1,5 @@
 # Frequenz Microgrid API Client Release Notes
 
-## Summary
-
-<!-- Here goes a general summary of what this release is about -->
-
 ## Upgrading
 
 - Now component and microgrid IDs are wrapped in new classes: `ComponentId` and `MicrogridId` respectively.
@@ -16,11 +12,3 @@
    - Ensuring proper hash behavior in collections.
 
    To migrate you just need to wrap your `int` IDs with the appropriate class: `0` -> `ComponentId(0)` / `MicrogridId(0)`.
-
-## New Features
-
-<!-- Here goes the main new features and examples or instructions on how to use them -->
-
-## Bug Fixes
-
-<!-- Here goes notable bug fixes that are worth a special mention or explanation -->
diff --git a/src/frequenz/client/microgrid/_id.py b/src/frequenz/client/microgrid/_id.py
index 411b532d..9e1b77f8 100644
--- a/src/frequenz/client/microgrid/_id.py
+++ b/src/frequenz/client/microgrid/_id.py
@@ -4,6 +4,10 @@
 """Strongly typed IDs for microgrids and components."""
 
 
+from typing import final
+
+
+@final
 class MicrogridId:
     """A unique identifier for a microgrid."""
 
@@ -53,6 +57,7 @@ def __str__(self) -> str:
         return f"MID{self._id}"
 
 
+@final
 class ComponentId:
     """A unique identifier for a microgrid component."""