diff -urN nlopt.orig/Makefile nlopt/Makefile
--- nlopt.orig/Makefile	2018-03-18 07:49:30.000000000 +0100
+++ nlopt/Makefile	2018-11-25 12:04:34.537008000 +0100
@@ -2,10 +2,9 @@
 # $FreeBSD: head/math/nlopt/Makefile 464873 2018-03-18 05:35:18Z linimon $
 
 PORTNAME=	nlopt
-PORTVERSION=	2.4.2
-PORTREVISION=	3
+DISTVERSIONPREFIX=	v
+DISTVERSION=	2.5.0
 CATEGORIES=	math
-MASTER_SITES=	http://ab-initio.mit.edu/nlopt/
 
 MAINTAINER=	rhurlin@gwdg.de
 COMMENT=	Nonlinear optimization library
@@ -20,17 +19,16 @@
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libguile-2.0.so:lang/guile2
 BUILD_DEPENDS=	swig3.0:devel/swig30 \
-		${PYTHON_PKGNAMEPREFIX}numpy>=1.9.1,1:math/py-numpy@${PY_FLAVOR}
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=1.9.1,1:math/py-numpy@${PY_FLAVOR}
+		${PYTHON_PKGNAMEPREFIX}numpy>=1.15.1:math/py-numpy@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy>=1.15.1:math/py-numpy@${PY_FLAVOR}
 
-GNU_CONFIGURE=	yes
-CONFIGURE_ARGS=	--enable-shared
-CONFIGURE_ENV=	SWIG="${LOCALBASE}/bin/swig3.0"
-
-USES=		autoreconf compiler:features libtool pathfix \
-		pkgconfig python:2.7
+USES=		cmake compiler:features pathfix pkgconfig python:2.7
 USE_LDCONFIG=	yes
 
-INSTALL_TARGET=	install-strip
+USE_GITHUB=	yes
+GH_ACCOUNT=	stevengj
+
+# Needed to find gmp.h
+CFLAGS+=	-I${LOCALBASE}/include
 
 .include <bsd.port.mk>
diff -urN nlopt.orig/distinfo nlopt/distinfo
--- nlopt.orig/distinfo	2015-12-16 15:38:15.000000000 +0100
+++ nlopt/distinfo	2018-11-25 08:46:28.171974000 +0100
@@ -1,2 +1,3 @@
-SHA256 (nlopt-2.4.2.tar.gz) = 8099633de9d71cbc06cd435da993eb424bbcdbded8f803cdaa9fb8c6e09c8e89
-SIZE (nlopt-2.4.2.tar.gz) = 2361992
+TIMESTAMP = 1543131988
+SHA256 (stevengj-nlopt-v2.5.0_GH0.tar.gz) = c6dd7a5701fff8ad5ebb45a3dc8e757e61d52658de3918e38bab233e7fd3b4ae
+SIZE (stevengj-nlopt-v2.5.0_GH0.tar.gz) = 2403609
diff -urN nlopt.orig/pkg-descr nlopt/pkg-descr
--- nlopt.orig/pkg-descr	2016-05-19 21:07:14.000000000 +0200
+++ nlopt/pkg-descr	2018-11-25 11:43:04.295609000 +0100
@@ -14,5 +14,7 @@
     algorithms exploiting user-supplied gradients.
   - Algorithms for unconstrained optimization, bound-constrained
     optimization, and general nonlinear inequality/equality constraints.
+  - Free/open-source software under the GNU LGPL
+    (and looser licenses for some portions of NLopt).
 
-WWW: http://ab-initio.mit.edu/wiki/index.php/NLopt
+WWW: https://nlopt.readthedocs.io/en/latest/
diff -urN nlopt.orig/pkg-plist nlopt/pkg-plist
--- nlopt.orig/pkg-plist	2015-12-16 15:38:15.000000000 +0100
+++ nlopt/pkg-plist	2018-11-25 11:39:41.271806000 +0100
@@ -1,21 +1,18 @@
 include/nlopt.f
 include/nlopt.h
 include/nlopt.hpp
-lib/libnlopt.a
+lib/cmake/nlopt/NLoptConfig.cmake
+lib/cmake/nlopt/NLoptConfigVersion.cmake
+lib/cmake/nlopt/NLoptLibraryDepends-%%CMAKE_BUILD_TYPE%%.cmake
+lib/cmake/nlopt/NLoptLibraryDepends.cmake
+lib/guile/2.0/extensions/nlopt_guile.so
 lib/libnlopt.so
 lib/libnlopt.so.0
-lib/libnlopt.so.0.8.2
-lib/libnlopt_guile.a
-lib/libnlopt_guile.so
-lib/libnlopt_guile.so.0
-lib/libnlopt_guile.so.0.8.2
-libdata/pkgconfig/nlopt.pc
-%%PYTHON_SITELIBDIR%%/_nlopt.a
+lib/libnlopt.so.0.9.0
 %%PYTHON_SITELIBDIR%%/_nlopt.so
-%%PYTHON_SITELIBDIR%%/_nlopt.so.0
-%%PYTHON_SITELIBDIR%%/_nlopt.so.0.8.2
 %%PYTHON_SITELIBDIR%%/nlopt.py
-%%PYTHON_SITELIBDIR%%/nlopt.pyc
-%%PYTHON_SITELIBDIR%%/nlopt.pyo
+libdata/pkgconfig/nlopt.pc
 man/man3/nlopt.3.gz
+man/man3/nlopt_minimize.3.gz
+man/man3/nlopt_minimize_constrained.3.gz
 share/guile/site/2.0/nlopt.scm