diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index af4308728a..b9d6f2a168 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -24,7 +24,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)  # not necessary, but encouraged
 project (IfcOpenShell VERSION 0.6.0)
 
 # use extra version to make pre-release using eg semver 
-set( EXTRA_VERSION "-alpha.2")
+set( EXTRA_VERSION "-alpha.3")
 
 foreach(max_year RANGE 2014 2030)
 set(max_sdk "$ENV{ADSK_3DSMAX_SDK_${max_year}}")