diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8bf21f..82ccc01 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,7 @@ cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
 
 project(kaldialign CXX)
 
-set(KALDIALIGN_VERSION "0.3")
+set(KALDIALIGN_VERSION "0.4")
 
 if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release)
diff --git a/MANIFEST.in b/MANIFEST.in
index f31ce24..39f10c0 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,5 @@
 include LICENSE
 include extensions/*
-include tests/*
\ No newline at end of file
+include tests/*
+include CMakeLists.txt
+recursive-include cmake *.*