diff --git a/iperf-3.8.1.tar.gz b/iperf-3.8.1.tar.gz
deleted file mode 100644
index 6facc1b..0000000
--- a/iperf-3.8.1.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e5b080f3273a8a715a4100f13826ac2ca31cc7b1315925631b2ecf64957ded96
-size 618098
diff --git a/iperf-3.9.tar.gz b/iperf-3.9.tar.gz
new file mode 100644
index 0000000..bcb9aaa
--- /dev/null
+++ b/iperf-3.9.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:24b63a26382325f759f11d421779a937b63ca1bc17c44587d2fcfedab60ac038
+size 622459
diff --git a/iperf.changes b/iperf.changes
index 58ae9ff..5706745 100644
--- a/iperf.changes
+++ b/iperf.changes
@@ -1,3 +1,22 @@
+-------------------------------------------------------------------
+Mon Sep 14 10:48:05 UTC 2020 - Dirk Mueller <dmueller@suse.com>
+
+- update to 3.9:
+  * A --timestamps flag has been added, which prepends a timestamp to
+    each output line.  An optional argument to this flag, which is a
+    format specification to strftime(3), allows for custom timestamp
+    formats (#909, #1028).
+  * A --server-bitrate-limit flag has been added as a server-side
+    command-line argument.  It allows a server to enforce a maximum
+    throughput rate; client connections that specify a higher bitrate
+    or exceed this bitrate during a test will be terminated.  The
+    bitrate is expressed in bits per second, with an optional trailing
+    slash and integer count that specifies an averaging interval over
+    which to enforce the limit (#999).
+  * A bug that caused increased CPU usage with the --bidir option has
+    been fixed (#1011).
+  * Fixed various minor memory leaks (#1023).
+
 -------------------------------------------------------------------
 Sat Jul 11 09:45:53 UTC 2020 - Michal Svec <msvec@suse.com>
 
diff --git a/iperf.spec b/iperf.spec
index 7e73baf..4bbd0ea 100644
--- a/iperf.spec
+++ b/iperf.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package iperf
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,7 +18,7 @@
 
 %define soname  0
 Name:           iperf
-Version:        3.8.1
+Version:        3.9
 Release:        0
 Summary:        A tool to measure network performance
 License:        BSD-3-Clause
@@ -26,13 +26,12 @@ Group:          Productivity/Networking/Diagnostic
 URL:            https://software.es.net/iperf/
 #Source URL:    http://downloads.es.net/pub/iperf/%{name}-%{version}.tar.gz
 Source:         http://downloads.es.net/pub/iperf/%{name}-%{version}.tar.gz
+Requires:       lib%{name}%{soname} = %{version}-%{release}
 %if %{?sles_version} && %{?sles_version} <= 11
 BuildRequires:  libuuid-devel
 %else
 BuildRequires:  pkgconfig(uuid)
 %endif
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-Requires:       lib%{name}%{soname} = %{version}-%{release}
 
 %description
 Iperf is a tool for active measurements of the maximum achievable bandwidth
@@ -83,7 +82,7 @@ This package contains development files.
 
 %build
 %configure --disable-static
-make %{?_smp_mflags}
+%make_build
 
 %install
 %make_install
@@ -95,19 +94,17 @@ rm %{buildroot}%{_libdir}/lib%{name}.la
 %postun -n lib%{name}%{soname} -p /sbin/ldconfig
 
 %files
-%defattr(-, root, root)
-%doc LICENSE README.md RELNOTES.md
+%license LICENSE
+%doc README.md RELNOTES.md
 %{_bindir}/%{name}3
 %{_mandir}/man1/%{name}3.1%{?ext_man}
 
 %files -n lib%{name}%{soname}
-%defattr(-, root, root)
-%doc LICENSE
+%license LICENSE
 %{_libdir}/lib%{name}.so.*
 
 %files devel
-%defattr(-, root, root)
-%doc LICENSE
+%license LICENSE
 %{_includedir}/%{name}_api.h
 %{_libdir}/lib%{name}.so
 %{_mandir}/man3/lib%{name}.3%{?ext_man}