diff --git a/V4.7.tar.gz b/V4.7.tar.gz
deleted file mode 100644
index f94c046..0000000
--- a/V4.7.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:08465f61bc03a13fc18704ede488b09eea2911812cd88efb392b3bc2f299058b
-size 47458115
diff --git a/V4.9.tar.gz b/V4.9.tar.gz
new file mode 100644
index 0000000..b4eb56a
--- /dev/null
+++ b/V4.9.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c6c7fd17e833cd2f01ea1b5a03104dee658513b708afcb1fa683a217e4e6294a
+size 47482213
diff --git a/polymake.changes b/polymake.changes
index 4741299..52edb7c 100644
--- a/polymake.changes
+++ b/polymake.changes
@@ -1,3 +1,20 @@
+-------------------------------------------------------------------
+Mon Jan 30 11:46:29 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 4.9
+  * fulton: markov_bases: add new client
+  * polytope: mps files: many fixes in parser and writer
+
+-------------------------------------------------------------------
+Tue Dec 20 23:49:39 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 4.8
+  * plantri: introduce interface to plantri for generation of
+    planar graphs.
+  * pluecker_ideal changed to c++ client
+  * add tropical median
+- Drop vertices-31.patch (merged)
+
 -------------------------------------------------------------------
 Sat Nov 19 00:54:38 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/polymake.spec b/polymake.spec
index ed8f9e6..af45fd3 100644
--- a/polymake.spec
+++ b/polymake.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package polymake
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,9 +16,9 @@
 #
 
 
-%define lname   libpolymake4_7
+%define lname   libpolymake4_9
 Name:           polymake
-Version:        4.7
+Version:        4.9
 Release:        0
 Summary:        Application for studying combinatorics and geometry of convex polytopes
 License:        GPL-2.0-or-later
@@ -28,9 +28,9 @@ URL:            https://polymake.org/
 Source:         https://github.com/polymake/polymake/archive/V%version.tar.gz
 Source9:        %name-rpmlintrc
 Patch2:         sympol-system.patch
-Patch3:         vertices-31.patch
 BuildRequires:  bliss-devel
 BuildRequires:  cddlib-devel
+BuildRequires:  fdupes
 BuildRequires:  flint-devel
 BuildRequires:  gcc-c++ >= 5
 BuildRequires:  gmp-devel >= 4.2
@@ -85,7 +85,9 @@ objects, and other objects.
 %autosetup -p1
 
 %build
-# Not AC.
+# force using system libnormaliz
+rm -rf bundled/libnormaliz/external
+# It's not autoconf.
 ./configure --prefix="%_prefix" --libdir="%_libdir" \
 	--libexecdir="%_libdir/%name-%version" --without-native \
 	--with-bliss="%_prefix" --with-sympol="%_prefix" --with-cdd="%_prefix" \
@@ -104,6 +106,7 @@ find "%buildroot/%_includedir" -type f -exec chmod a-x {} +
 mv "%buildroot/%_libdir/polymake-%version/lib"/libp* "%buildroot/%_libdir/"
 # zero size file, why
 rm -f "%buildroot/%_libdir/polymake-%version/lib/ideal.so"
+%fdupes %buildroot/%_prefix
 
 %post   -n %lname -p /sbin/ldconfig
 %postun -n %lname -p /sbin/ldconfig
diff --git a/vertices-31.patch b/vertices-31.patch
deleted file mode 100644
index 6d88820..0000000
--- a/vertices-31.patch
+++ /dev/null
@@ -1,17 +0,0 @@
-Resolve a build failure on ILP32.
-
-References: https://gist.github.com/benlorenz/76b0cc37e332943e0129e1e922a1b577
-
-Index: polymake-4.7/apps/topaz/include/grass_plucker.h
-===================================================================
---- polymake-4.7.orig/apps/topaz/include/grass_plucker.h
-+++ polymake-4.7/apps/topaz/include/grass_plucker.h
-@@ -122,7 +122,7 @@ using CubeIndex = NamedType<Int, CubeInd
-   inline constexpr Int max_n_vertices(31); 
-   inline constexpr Int first_cube_index(Int(1) << max_n_vertices);
- */
--#define max_n_vertices 31
-+#define max_n_vertices ((Int) sizeof(Int)*4-1)
- #define first_cube_index (CubeIndex(Int(1) << (2*max_n_vertices)))
- #define MAGIC_VERTEX_MULTIPLE 256
-