Update changelog and version number.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9cda13..88a48bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
cmake_minimum_required(VERSION 3.0)
-project(double-conversion VERSION 3.1.6)
+project(double-conversion VERSION 3.1.7)
if(BUILD_SHARED_LIBS AND MSVC)
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
diff --git a/Changelog b/Changelog
index cee1b0f..f734a32 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,7 @@
+2021-12-22:
+ Add support of Synopsys ARC64 architecture.
+ Reintroduce macros, if DOUBLE_CONVERSION_NON_PREFIXED_MACROS is set.
+
2021-12-04:
Update version number.
