diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd40648..6e21a09 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ if(NOT DEFINED PROJECT_NAME)
 endif()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-project(Tiled-MM VERSION 2.3 LANGUAGES CXX)
+project(Tiled-MM VERSION 2.3.1 LANGUAGES CXX)
 
 option(TILEDMM_WITH_TESTS "Enable tests." ${MASTER_PROJECT})
 option(TILEDMM_WITH_EXAMPLES "Enable examples." ${MASTER_PROJECT})