diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index 73e0b2118f..8c8d1957f7 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -23,6 +23,7 @@ import (
 	"github.com/containers/storage"
 	"github.com/containers/storage/pkg/archive"
 	"github.com/containers/storage/pkg/mount"
+	"github.com/coreos/go-systemd/v22/daemon"
 	securejoin "github.com/cyphar/filepath-securejoin"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/opencontainers/runtime-tools/generate"
@@ -1166,6 +1167,12 @@ func (c *Container) start() error {
 
 	c.state.State = define.ContainerStateRunning
 
+	if sent, err := daemon.SdNotify(false, fmt.Sprintf("MAINPID=%d\n", c.state.ConmonPID)); err != nil {
+		logrus.Errorf("Error notifying systemd of Conmon PID: %s", err.Error())
+	} else if sent {
+		logrus.Debugf("Notify MAINPID sent successfully")
+	}
+
 	if c.config.HealthCheckConfig != nil {
 		if err := c.updateHealthStatus(define.HealthCheckStarting); err != nil {
 			logrus.Error(err)
diff --git a/libpod/oci_conmon_linux.go b/libpod/oci_conmon_linux.go
index 625a5bf706..d195fdfcf6 100644
--- a/libpod/oci_conmon_linux.go
+++ b/libpod/oci_conmon_linux.go
@@ -30,6 +30,7 @@ import (
 	"github.com/containers/libpod/utils"
 	pmount "github.com/containers/storage/pkg/mount"
 	"github.com/coreos/go-systemd/v22/activation"
+	"github.com/coreos/go-systemd/v22/daemon"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/opencontainers/selinux/go-selinux"
 	"github.com/opencontainers/selinux/go-selinux/label"
@@ -1016,6 +1017,11 @@ func (r *ConmonOCIRuntime) createOCIContainer(ctr *Container, restoreOptions *Co
 		// conmon not having a pid file is a valid state, so don't set it if we don't have it
 		logrus.Infof("Got Conmon PID as %d", conmonPID)
 		ctr.state.ConmonPID = conmonPID
+		if sent, err := daemon.SdNotify(false, fmt.Sprintf("MAINPID=%d\n", conmonPID)); err != nil {
+			logrus.Errorf("Error notifying systemd of Conmon PID: %s", err.Error())
+		} else if sent {
+			logrus.Debugf("Notify MAINPID sent successfully")
+		}
 	}
 
 	return nil
diff --git a/vendor/github.com/coreos/go-systemd/v22/daemon/sdnotify.go b/vendor/github.com/coreos/go-systemd/v22/daemon/sdnotify.go
new file mode 100644
index 0000000000..ba4ae31f19
--- /dev/null
+++ b/vendor/github.com/coreos/go-systemd/v22/daemon/sdnotify.go
@@ -0,0 +1,84 @@
+// Copyright 2014 Docker, Inc.
+// Copyright 2015-2018 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// Package daemon provides a Go implementation of the sd_notify protocol.
+// It can be used to inform systemd of service start-up completion, watchdog
+// events, and other status changes.
+//
+// https://www.freedesktop.org/software/systemd/man/sd_notify.html#Description
+package daemon
+
+import (
+	"net"
+	"os"
+)
+
+const (
+	// SdNotifyReady tells the service manager that service startup is finished
+	// or the service finished loading its configuration.
+	SdNotifyReady = "READY=1"
+
+	// SdNotifyStopping tells the service manager that the service is beginning
+	// its shutdown.
+	SdNotifyStopping = "STOPPING=1"
+
+	// SdNotifyReloading tells the service manager that this service is
+	// reloading its configuration. Note that you must call SdNotifyReady when
+	// it completed reloading.
+	SdNotifyReloading = "RELOADING=1"
+
+	// SdNotifyWatchdog tells the service manager to update the watchdog
+	// timestamp for the service.
+	SdNotifyWatchdog = "WATCHDOG=1"
+)
+
+// SdNotify sends a message to the init daemon. It is common to ignore the error.
+// If `unsetEnvironment` is true, the environment variable `NOTIFY_SOCKET`
+// will be unconditionally unset.
+//
+// It returns one of the following:
+// (false, nil) - notification not supported (i.e. NOTIFY_SOCKET is unset)
+// (false, err) - notification supported, but failure happened (e.g. error connecting to NOTIFY_SOCKET or while sending data)
+// (true, nil) - notification supported, data has been sent
+func SdNotify(unsetEnvironment bool, state string) (bool, error) {
+	socketAddr := &net.UnixAddr{
+		Name: os.Getenv("NOTIFY_SOCKET"),
+		Net:  "unixgram",
+	}
+
+	// NOTIFY_SOCKET not set
+	if socketAddr.Name == "" {
+		return false, nil
+	}
+
+	if unsetEnvironment {
+		if err := os.Unsetenv("NOTIFY_SOCKET"); err != nil {
+			return false, err
+		}
+	}
+
+	conn, err := net.DialUnix(socketAddr.Net, nil, socketAddr)
+	// Error connecting to NOTIFY_SOCKET
+	if err != nil {
+		return false, err
+	}
+	defer conn.Close()
+
+	if _, err = conn.Write([]byte(state)); err != nil {
+		return false, err
+	}
+	return true, nil
+}
diff --git a/vendor/github.com/coreos/go-systemd/v22/daemon/watchdog.go b/vendor/github.com/coreos/go-systemd/v22/daemon/watchdog.go
new file mode 100644
index 0000000000..7a0e0d3a51
--- /dev/null
+++ b/vendor/github.com/coreos/go-systemd/v22/daemon/watchdog.go
@@ -0,0 +1,73 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package daemon
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"time"
+)
+
+// SdWatchdogEnabled returns watchdog information for a service.
+// Processes should call daemon.SdNotify(false, daemon.SdNotifyWatchdog) every
+// time / 2.
+// If `unsetEnvironment` is true, the environment variables `WATCHDOG_USEC` and
+// `WATCHDOG_PID` will be unconditionally unset.
+//
+// It returns one of the following:
+// (0, nil) - watchdog isn't enabled or we aren't the watched PID.
+// (0, err) - an error happened (e.g. error converting time).
+// (time, nil) - watchdog is enabled and we can send ping.
+//   time is delay before inactive service will be killed.
+func SdWatchdogEnabled(unsetEnvironment bool) (time.Duration, error) {
+	wusec := os.Getenv("WATCHDOG_USEC")
+	wpid := os.Getenv("WATCHDOG_PID")
+	if unsetEnvironment {
+		wusecErr := os.Unsetenv("WATCHDOG_USEC")
+		wpidErr := os.Unsetenv("WATCHDOG_PID")
+		if wusecErr != nil {
+			return 0, wusecErr
+		}
+		if wpidErr != nil {
+			return 0, wpidErr
+		}
+	}
+
+	if wusec == "" {
+		return 0, nil
+	}
+	s, err := strconv.Atoi(wusec)
+	if err != nil {
+		return 0, fmt.Errorf("error converting WATCHDOG_USEC: %s", err)
+	}
+	if s <= 0 {
+		return 0, fmt.Errorf("error WATCHDOG_USEC must be a positive number")
+	}
+	interval := time.Duration(s) * time.Microsecond
+
+	if wpid == "" {
+		return interval, nil
+	}
+	p, err := strconv.Atoi(wpid)
+	if err != nil {
+		return 0, fmt.Errorf("error converting WATCHDOG_PID: %s", err)
+	}
+	if os.Getpid() != p {
+		return 0, nil
+	}
+
+	return interval, nil
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 882ea5d251..f56dd94a9e 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -199,6 +199,7 @@ github.com/containers/storage/pkg/unshare
 github.com/coreos/go-iptables/iptables
 # github.com/coreos/go-systemd/v22 v22.1.0
 github.com/coreos/go-systemd/v22/activation
+github.com/coreos/go-systemd/v22/daemon
 github.com/coreos/go-systemd/v22/dbus
 github.com/coreos/go-systemd/v22/internal/dlopen
 github.com/coreos/go-systemd/v22/journal