diff --git a/biology/sim4/Makefile b/biology/sim4/Makefile
index be7f9bf6db4b..786ae43b0869 100644
--- a/biology/sim4/Makefile
+++ b/biology/sim4/Makefile
@@ -6,7 +6,7 @@
 #
 
 PORTNAME=	sim4
-PORTVERSION=	2001.10.12
+PORTVERSION=	2001.12.30
 CATEGORIES=	biology
 MASTER_SITES=	http://globin.cse.psu.edu/ftp/dist/sim4/
 DISTNAME=	sim4
diff --git a/biology/sim4/distinfo b/biology/sim4/distinfo
index 28f7c2100a99..427c7f5ec864 100644
--- a/biology/sim4/distinfo
+++ b/biology/sim4/distinfo
@@ -1 +1 @@
-MD5 (sim4.tar.gz) = e3753ec2cd0c9078bf12c2b01210c9b4
+MD5 (sim4.tar.gz) = b773b26d023e9f3b91d6455a90f0dac9