diff --git a/science/packmol/Makefile b/science/packmol/Makefile
index a591f8ec2a4b..1fa6a80a6993 100644
--- a/science/packmol/Makefile
+++ b/science/packmol/Makefile
@@ -1,19 +1,20 @@
 PORTNAME=	packmol
-DISTVERSION=	18.169
-PORTREVISION=	1
+DISTVERSIONPREFIX=	v
+DISTVERSION=	20.15.3
 CATEGORIES=	science
 
-MAINTAINER=	jwb@FreeBSD.org
-COMMENT=	Pack molecules in defined regions of space
-WWW=		http://m3g.iqm.unicamp.br/packmol/home.shtml
+MAINTAINER=	ports@FreeBSD.org
+COMMENT=	Creates Initial Configurations for Molecular Dynamics Simulations
+WWW=		https://m3g.github.io/packmol/ \
+		https://github.com/m3g/packmol/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake:noninja fortran
 USE_GITHUB=	yes
-GH_ACCOUNT=	mcubeg
+GH_ACCOUNT=	m3g
 
 PLIST_FILES=	bin/packmol
 
 .include <bsd.port.mk>
diff --git a/science/packmol/distinfo b/science/packmol/distinfo
index a598b7f167d4..08b9aca28e9e 100644
--- a/science/packmol/distinfo
+++ b/science/packmol/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1563043114
-SHA256 (mcubeg-packmol-18.169_GH0.tar.gz) = 8acf2cbc742a609e763eb00cae55aecd09af2edb4cc4e931706e2f06ac380de9
-SIZE (mcubeg-packmol-18.169_GH0.tar.gz) = 169840
+TIMESTAMP = 1733943120
+SHA256 (m3g-packmol-v20.15.3_GH0.tar.gz) = a7e63208251c9e404437e3c58c976afc2e747d545c6c42dcfbf0e3e29c2c3d14
+SIZE (m3g-packmol-v20.15.3_GH0.tar.gz) = 629639
diff --git a/science/packmol/pkg-descr b/science/packmol/pkg-descr
index acb1d3600884..20acf4963f80 100644
--- a/science/packmol/pkg-descr
+++ b/science/packmol/pkg-descr
@@ -1,3 +1,12 @@
-PACKMOL creates an initial point for molecular dynamics simulations by packing
-molecules in defined regions of space. The packing guarantees that short range
-repulsive interactions do not disrupt the simulations.
+PACKMOL creates an initial point for molecular dynamics simulations by
+packing molecules in defined regions of space. The packing guarantees
+that short range repulsive interactions do not disrupt the
+simulations.
+
+The package is compatible with input files of PDB, TINKER, XYZ and
+MOLDY formats.
+
+See also: ComplexMixtures.jl: A powerful package to understand
+solvation structures in complex solutions.  CellListMap.jl: Efficient
+and customizable cell list data structure for molecular simulations
+and customizable simulation analysis.
diff --git a/science/packmol/pkg-message b/science/packmol/pkg-message
deleted file mode 100644
index 8ffd9e822894..000000000000
--- a/science/packmol/pkg-message
+++ /dev/null
@@ -1,10 +0,0 @@
-[
-{ type: install
-  message: <<EOM
-
-To ensure continued development of PACKMOL, please register at
-
-http://m3g.iqm.unicamp.br/packmol/download.shtml
-EOM
-}
-]