diff --git a/ReleaseNotes.txt b/ReleaseNotes.txt
index 8f3e76da0..92e13dfb6 100644
--- a/ReleaseNotes.txt
+++ b/ReleaseNotes.txt
@@ -3,6 +3,10 @@
 - General:
     - Add utility function `qupulse.utils.types.has_type_interface` and use it to circumvent autoreload triggered isinstance fails
 
+- Pulse Templates:
+    - `MappingPulseTemplate`:
+        - Raise a ValueError if more than one inner channel is mapped to the same outer channel
+
 ## 0.3 ##
 
 - General: