diff --git a/include/etl/version.h b/include/etl/version.h
index 5f4d8a9e5..c6c0df644 100644
--- a/include/etl/version.h
+++ b/include/etl/version.h
@@ -40,7 +40,7 @@ SOFTWARE.
 
 #define ETL_VERSION_MAJOR 20
 #define ETL_VERSION_MINOR 39
-#define ETL_VERSION_PATCH 2
+#define ETL_VERSION_PATCH 3
 
 #define ETL_VERSION       ETL_STRING(ETL_VERSION_MAJOR) "." ETL_STRING(ETL_VERSION_MINOR) "." ETL_STRING(ETL_VERSION_PATCH)
 #define ETL_VERSION_W     ETL_WIDE_STRING(ETL_VERSION_MAJOR) L"." ETL_WIDE_STRING(ETL_VERSION_MINOR) L"." ETL_WIDE_STRING(ETL_VERSION_PATCH)
diff --git a/library.json b/library.json
index 60306c47d..74c2b1ee4 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "Embedded Template Library",
-  "version": "20.39.2",
+  "version": "20.39.3",
   "authors": {
     "name": "John Wellbelove",
     "email": "john.wellbelove@etlcpp.com"
diff --git a/library.properties b/library.properties
index d1e53cbb7..670beb809 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Embedded Template Library
-version=20.39.2
+version=20.39.3
 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 946827594..6e8c1d75e 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -1,4 +1,9 @@
 ===============================================================================
+20.39.3
+
+Removed C++11 restriction on etl::observer::notification
+
+===============================================================================
 20.39.2
 
 Removed EmbeddedTemplateLibrary-20.39.0.tar.gz from project.
diff --git a/version.txt b/version.txt
index bd970b9d0..2a51ae303 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-20.39.2
+20.39.3