diff --git a/CHANGELOG b/CHANGELOG
index a6686478..62a6b0a9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -11,3 +11,19 @@ a C file without issues
 - It is now possible to change the message queue depth for the telecommand verification service (PUS1)
 - The same is possible for the event reporting service (PUS5)
 - PUS Health Service added, which allows to command and retrieve health via PUS packets
+
+### Parameter Service
+
+- The API of the parameter service has been changed to prevent incosistencies
+and clarify usage when inspecting the code.
+- The parameter ID now consists of:
+	1. Domain ID (1 byte)
+	2. Unique Identifier (1 byte)
+	3. Linear Index (2 bytes)
+The linear index can be used for arrays as well as matrices.
+The parameter load command now explicitely expects the ECSS PTC and PFC
+information as well as  the rows and column number. Rows and column will
+default to one, which is equivalent to one scalar parameter (the most
+important use-case)
+
+