diff --git a/CMakeLists.txt b/CMakeLists.txt
index b81479cb8..2de8866b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,11 +6,13 @@ if(NOT DEFINED CMAKE_MACOSX_RPATH)
   set(CMAKE_MACOSX_RPATH 0)
 endif()
 
+set(CMAKE_CXX_STANDARD 17)
+
 # Set the version number for the library
 set (GTSAM_VERSION_MAJOR 4)
-set (GTSAM_VERSION_MINOR 2)
+set (GTSAM_VERSION_MINOR 3)
 set (GTSAM_VERSION_PATCH 0)
-set (GTSAM_PRERELEASE_VERSION "a8")
+set (GTSAM_PRERELEASE_VERSION "a0")
 math (EXPR GTSAM_VERSION_NUMERIC "10000 * ${GTSAM_VERSION_MAJOR} + 100 * ${GTSAM_VERSION_MINOR} + ${GTSAM_VERSION_PATCH}")
 
 if (${GTSAM_VERSION_PATCH} EQUAL 0)