diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index b6c515d..4840c5e 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 0
-PNGMIN = 1.4.0beta29
+PNGMIN = 1.4.0beta30
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names: