diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bd002e56..a468d8d40 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,7 +71,7 @@ message (STATUS "******************************************************")
 
 include (set_build_type)
 # RC 0 or omitted is a development build, GA is a General Availability release build
-set_build_type (RC 3)
+set_build_type (RC 4)
 set (wsjtx_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}${BUILD_TYPE_REVISION}")
 
 #