diff --git a/chrony-3.5.tar.gz.sig b/chrony-3.5.tar.gz.sig
deleted file mode 100644
index 62692ba..0000000
--- a/chrony-3.5.tar.gz.sig
+++ /dev/null
@@ -1,6 +0,0 @@
------BEGIN PGP SIGNATURE-----
-
-iEYEABECAAYFAlzan7cACgkQX/BvKboeATtxzQCffUevHEDrRWPbdK9drojf97s1
-9kIAn0onspGVxrj21mhFtd1vNjsSG+8f
-=AveM
------END PGP SIGNATURE-----
diff --git a/chrony.changes b/chrony.changes
index 4be55c7..9c8535d 100644
--- a/chrony.changes
+++ b/chrony.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Oct 21 07:57:44 UTC 2019 - Martin Pluskal <mpluskal@suse.com>
+
+- Temporarily disable signature usage as its expired
+- Update clknetsim to version ac3c832
+
 -------------------------------------------------------------------
 Sat Oct 19 08:27:17 UTC 2019 - Mathias Homann <Mathias.Homann@opensuse.org>
 
diff --git a/chrony.spec b/chrony.spec
index 523919e..f284d85 100644
--- a/chrony.spec
+++ b/chrony.spec
@@ -17,7 +17,7 @@
 
 
 %define vendorzone opensuse.
-%global clknetsim_ver 58c5e8b
+%global clknetsim_ver ac3c832
 #Compat macro for new _fillupdir macro introduced in Nov 2017
 %if ! %{defined _fillupdir}
   %define _fillupdir %{_localstatedir}/adm/fillup-templates
@@ -35,7 +35,7 @@ Source3:        chrony.dhclient
 Source4:        chrony.helper
 Source5:        chrony-dnssrv@.service
 Source6:        chrony-dnssrv@.timer
-Source7:        https://download.tuxfamily.org/chrony/chrony-3.4-tar-gz-asc.txt#/chrony-%{version}.tar.gz.sig
+#Source7:        https://download.tuxfamily.org/chrony/chrony-3.4-tar-gz-asc.txt#/chrony-%{version}.tar.gz.sig
 Source8:        chrony.keyring
 # Simulator for test suite
 Source10:       https://github.com/mlichvar/clknetsim/archive/%{clknetsim_ver}/clknetsim-%{clknetsim_ver}.tar.gz
@@ -58,17 +58,15 @@ BuildRequires:  pps-tools-devel
 # removed if the call to make check is ever deleted.
 BuildRequires:  timezone
 BuildRequires:  pkgconfig(systemd)
-
-# asciidoctor to create html docs, only available on Leap 15.0 ++
-%if 0%{?suse_version} == 1500 && 0%{?is_opensuse} && !0%{?is_backports}
-BuildRequires:  ruby2.5-rubygem-asciidoctor
-%endif
-
 Requires:       logrotate
 Requires(post): %fillup_prereq
 Requires(pre):  %{_sbindir}/groupadd
 Requires(pre):  %{_sbindir}/useradd
 Provides:       ntp-daemon
+# asciidoctor to create html docs, only available on Leap 15.0 ++
+%if 0%{?suse_version} == 1500 && 0%{?is_opensuse} && !0%{?is_backports}
+BuildRequires:  ruby2.5-rubygem-asciidoctor
+%endif
 %ifarch s390 s390x ppc64le
 BuildRequires:  libseccomp-devel >= 2.2.0
 %else
diff --git a/clknetsim-58c5e8b.tar.gz b/clknetsim-58c5e8b.tar.gz
deleted file mode 100644
index d101e00..0000000
--- a/clknetsim-58c5e8b.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:63566698c2c4bf70abd999666a02d52d00a85e68990bbed0361ffc50c9edf945
-size 42424
diff --git a/clknetsim-ac3c832.tar.gz b/clknetsim-ac3c832.tar.gz
new file mode 100644
index 0000000..be307e0
--- /dev/null
+++ b/clknetsim-ac3c832.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a7aae6e77622f3f0db33bc5a2bab55548ccadf6f19432923a0855f10fca9b3de
+size 45455