diff --git a/CPP/CMakeLists.txt b/CPP/CMakeLists.txt
index 99b656ac..0e68fa9f 100644
--- a/CPP/CMakeLists.txt
+++ b/CPP/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.15)
-project(Clipper2 VERSION 1.3.0 LANGUAGES C CXX)
+project(Clipper2 VERSION 1.4.0 LANGUAGES C CXX)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 if(NOT DEFINED CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD LESS 17)
diff --git a/CPP/Clipper2Lib/include/clipper2/clipper.version.h b/CPP/Clipper2Lib/include/clipper2/clipper.version.h
index d7644067..61464095 100644
--- a/CPP/Clipper2Lib/include/clipper2/clipper.version.h
+++ b/CPP/Clipper2Lib/include/clipper2/clipper.version.h
@@ -1,6 +1,6 @@
 #ifndef CLIPPER_VERSION_H
 #define CLIPPER_VERSION_H
 
-constexpr auto CLIPPER2_VERSION = "1.3.0";
+constexpr auto CLIPPER2_VERSION = "1.4.0";
 
 #endif  // CLIPPER_VERSION_H