diff --git a/CMakeLists.txt b/CMakeLists.txt
index 252cc68..0e422ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@
 #
 set(PT_VERSION_MAJOR 1)
 set(PT_VERSION_MINOR 6)
-set(PT_VERSION_BUILD "3" CACHE STRING "")
+set(PT_VERSION_BUILD "4" CACHE STRING "")
 set(PT_VERSION_EXT "" CACHE STRING "")
 
 set(PT_VERSION "${PT_VERSION_MAJOR}.${PT_VERSION_MINOR}.${PT_VERSION_BUILD}")