diff --git a/buildtools/version.py b/buildtools/version.py
index 2c1fb341..33ae0551 100644
--- a/buildtools/version.py
+++ b/buildtools/version.py
@@ -26,7 +26,7 @@ VER_MAJOR        = 4
 VER_MINOR        = 1
 VER_RELEASE      = 0
 
-VER_FLAGS        = ""     # wxPython release flags
+VER_FLAGS        = "a1"     # wxPython release flags
 
 # The VER_FLAGS value is appended to the version number constructed from the
 # first 3 components and should be set according to the following patterns.
@@ -62,5 +62,5 @@ VER_FLAGS        = ""     # wxPython release flags
 # The version numbers of wxWidgets to be used in the build
 wxVER_MAJOR        = 3
 wxVER_MINOR        = 1
-wxVER_RELEASE      = 1  # only used when wxVER_MINOR is an odd value
+wxVER_RELEASE      = 2  # only used when wxVER_MINOR is an odd value