diff --git a/dhcpd.service b/dhcpd.service
index 416dc60..3e36c25 100644
--- a/dhcpd.service
+++ b/dhcpd.service
@@ -4,7 +4,7 @@ After=syslog.target network.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/dhcpd
-ExecStart=/usr/sbin/dhcpd -d $DHCPDARGS
+ExecStart=/usr/sbin/dhcpd -d --no-pid $DHCPDARGS
 
 [Install]
 WantedBy=multi-user.target
diff --git a/dhcpd6.service b/dhcpd6.service
index 12b0bda..0e38429 100644
--- a/dhcpd6.service
+++ b/dhcpd6.service
@@ -4,7 +4,7 @@ After=syslog.target network.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/dhcpd6
-ExecStart=/usr/sbin/dhcpd -6 -d $DHCPDARGS
+ExecStart=/usr/sbin/dhcpd -6 -d --no-pid $DHCPDARGS
 
 [Install]
 WantedBy=multi-user.target
diff --git a/dhcrelay.service b/dhcrelay.service
index cbb19bd..7992a26 100644
--- a/dhcrelay.service
+++ b/dhcrelay.service
@@ -4,7 +4,7 @@ After=syslog.target network.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/dhcrelay
-ExecStart=/usr/sbin/dhcrelay -d $DHCRELAYARGS
+ExecStart=/usr/sbin/dhcrelay -d --no-pid $DHCRELAYARGS
 
 [Install]
 WantedBy=multi-user.target