diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index 434958e..0d887ab 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.4.0beta27
+;Version 1.4.0beta28
   png_build_grayscale_palette
   png_chunk_error
   png_chunk_warning