diff --git a/include/etl/version.h b/include/etl/version.h
index a7a55ed4..b1ef9714 100644
--- a/include/etl/version.h
+++ b/include/etl/version.h
@@ -38,8 +38,8 @@ SOFTWARE.
 ///\ingroup utilities
 
 #define ETL_VERSION_MAJOR 20
-#define ETL_VERSION_MINOR  5
-#define ETL_VERSION_PATCH  2
+#define ETL_VERSION_MINOR  6
+#define ETL_VERSION_PATCH  0
 #define ETL_VERSION       ETL_STRINGIFY(ETL_VERSION_MAJOR) "." ETL_STRINGIFY(ETL_VERSION_MINOR) "." ETL_STRINGIFY(ETL_VERSION_PATCH)
 #define ETL_VERSION_W     ETL_STRINGIFY(ETL_VERSION_MAJOR) L"." ETL_STRINGIFY(ETL_VERSION_MINOR) L"." ETL_STRINGIFY(ETL_VERSION_PATCH)
 #define ETL_VERSION_U16   ETL_STRINGIFY(ETL_VERSION_MAJOR) u"." ETL_STRINGIFY(ETL_VERSION_MINOR) u"." ETL_STRINGIFY(ETL_VERSION_PATCH)
diff --git a/library.json b/library.json
index 36437966..1297047f 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "ETL Embedded Template Library",
-  "version": "20.5.2",
+  "version": "20.6.0",
   "author s": {
     "name": "John Wellbelove",
     "email": "john.wellbelove@etlcpp.com"
diff --git a/library.properties b/library.properties
index 182ede8c..e3ae4d6b 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Embedded Template Library ETL
-version=20.5.2
+version=20.6.0
 author= John Wellbelove <john.wellbelove@etlcpp.com>
 maintainer=John Wellbelove <john.wellbelove@etlcpp.com>
 license=MIT
diff --git a/support/Release notes.txt b/support/Release notes.txt
index cf63ae22..76c5b38b 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -1,3 +1,10 @@
+===============================================================================
+20.6.0
+Added etl::message_router_registry.
+Changed etl::flat_multimap & etl::flat_multiset to iterate in insertion order.
+C++98 compatibility fixes.
+Abstracted unit test framework header.
+
 ===============================================================================
 20.5.2
 Fixed template aliases when using STL and below C++14
@@ -30,7 +37,7 @@ Added ETL_CONSTANT to numeric_limits member functions.
 Added initialize_free_space(), trim_to_terminator() and data_end() functions to
 strings for easier integration with C APIs.
 
-===============================================================================
+=============================================================================== 
 20.2.3
 Fixed indexing error in find_next() for etl::bitset.