diff --git a/support/Release notes.txt b/support/Release notes.txt
index 66de7620..2a8bbd43 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -9,6 +9,7 @@ Changed ETL_ENDIANNESS_IS_CONSTEXPR to ETL_HAS_CONSTEXPR_ENDIANNESS.
 Changed ETL_CONSTEXPR17 to ETL_CONSTEXPR14 for reverse iterators
 Added template wrappers around memcpy, memmove, memcmp, memset& memchr.
 The counter in etl::debug_count is atomic, if available.
+Embedded essential UnitTest++ source into the project, as it is no longer maintained on GitHub.
 
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 20.25.0