diff --git a/bitcoin.changes b/bitcoin.changes
index 17b3c4f..bca37cc 100644
--- a/bitcoin.changes
+++ b/bitcoin.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Fri Aug 27 07:49:41 UTC 2021 - Johannes Segitz <jsegitz@suse.com>
+
+- Added hardening to systemd service(s). Added patch(es):
+  * harden_bitcoind.service.patch
+  Modified:
+  * bitcoind.service
+
 -------------------------------------------------------------------
 Fri May 14 10:54:00 UTC 2021 - Ferdinand Thiessen <rpm@fthiessen.de>
 
diff --git a/bitcoin.spec b/bitcoin.spec
index c77c745..9e76c60 100644
--- a/bitcoin.spec
+++ b/bitcoin.spec
@@ -34,6 +34,7 @@ Source0:        https://github.com/%{name}/%{name}/archive/v%{version}.tar.gz#/%
 Source1:        %{base}d.service
 Source3:        %{base}d.conf
 Source4:        %{base}.conf
+Patch0:         harden_bitcoind.service.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  gcc-c++
@@ -165,7 +166,7 @@ several GB of space, slowly growing.
 This package provides automated tests for %{name}-qt5 and %{name}d.
 
 %prep
-%autosetup
+%autosetup -p1
 
 %build
 autoreconf -fiv
diff --git a/bitcoind.service b/bitcoind.service
index 62b3f45..3d1f536 100644
--- a/bitcoind.service
+++ b/bitcoind.service
@@ -4,6 +4,19 @@ Requires=network.target
 After=network.target
 
 [Service]
+# added automatically, for details please see
+# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
+ProtectSystem=full
+ProtectHome=true
+PrivateDevices=true
+ProtectHostname=true
+ProtectClock=true
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectKernelLogs=true
+ProtectControlGroups=true
+RestrictRealtime=true
+# end of automatic additions 
 User=bitcoin
 PIDFile=/run/bitcoin/bitcoind.pid
 ExecStart=/usr/bin/bitcoind -conf=/etc/bitcoin/bitcoin.conf -pid=/run/bitcoin/bitcoind.pid -datadir=/var/lib/bitcoin
diff --git a/harden_bitcoind.service.patch b/harden_bitcoind.service.patch
new file mode 100644
index 0000000..817ea73
--- /dev/null
+++ b/harden_bitcoind.service.patch
@@ -0,0 +1,21 @@
+Index: bitcoin-0.21.1/contrib/init/bitcoind.service
+===================================================================
+--- bitcoin-0.21.1.orig/contrib/init/bitcoind.service
++++ bitcoin-0.21.1/contrib/init/bitcoind.service
+@@ -69,6 +69,16 @@ NoNewPrivileges=true
+ # Use a new /dev namespace only populated with API pseudo devices
+ # such as /dev/null, /dev/zero and /dev/random.
+ PrivateDevices=true
++# added automatically, for details please see
++# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
++ProtectHostname=true
++ProtectClock=true
++ProtectKernelTunables=true
++ProtectKernelModules=true
++ProtectKernelLogs=true
++ProtectControlGroups=true
++RestrictRealtime=true
++# end of automatic additions 
+ 
+ # Deny the creation of writable and executable memory mappings.
+ MemoryDenyWriteExecute=true