diff --git a/unbound.service b/unbound.service
index 287fe8d..49dc7bd 100644
--- a/unbound.service
+++ b/unbound.service
@@ -11,7 +11,7 @@ Wants=nss-lookup.target
 Type=simple
 EnvironmentFile=-/etc/sysconfig/unbound
 ExecStartPre=/usr/sbin/unbound-checkconf
-ExecStartPre=-/usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem -f /etc/resolv.conf -R
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_UNBOUND_ANCHOR" == "yes" ]; then /usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem -f /etc/resolv.conf -R; else echo "Updates of root keys with unbound-anchor is disabled"; fi'
 ExecStart=/usr/sbin/unbound -d $UNBOUND_OPTIONS
 ExecReload=/usr/sbin/unbound-control reload
 
diff --git a/unbound.spec b/unbound.spec
index e4964db..a871990 100644
--- a/unbound.spec
+++ b/unbound.spec
@@ -458,8 +458,10 @@ popd
 %attr(0644,root,root) %config %{_sysconfdir}/%{name}/root.key
 
 %changelog
-* Fri Apr 16 2021 Mohan Boddu <mboddu@redhat.com> - 1.13.1-2
-- Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937
+* Tue Apr 06 2021 Artem Egorenkov <aegorenk@redhat.com> - 1.13.1-4
+- Don't start unbound-anchor before unbound service if DISABLE_UNBOUND_ANCHOR
+  environment variable equals to "yes"
+- Resolves: rhbz#1951923
 
 * Wed Feb 10 2021 Paul Wouters <pwouters@redhat.com> - 1.13.1-1
 - Resolves rhbz#1860887 unbound-1.13.1 is available