diff --git a/PendingReleaseNotes.md b/PendingReleaseNotes.md
index c6abc3661..2a236ada0 100644
--- a/PendingReleaseNotes.md
+++ b/PendingReleaseNotes.md
@@ -12,6 +12,7 @@ an example usage
 - Rook can now be configured to read "region" and "zone" labels on Kubernetes nodes and use that information as part of the CRUSH location for the OSDs.
 - Rgw pods have liveness probe enabled
 - Rgw is now configured with the Beast backend as of the Nautilus release
+- OSD: newly updated cluster from 0.9 to 1.0.3 and thus Ceph Nautilus will have their OSDs allowing new features for Nautilus
 
 ## Breaking Changes
 
diff --git a/pkg/daemon/ceph/client/upgrade.go b/pkg/daemon/ceph/client/upgrade.go
index 550ba1af4..9208f9f70 100644
--- a/pkg/daemon/ceph/client/upgrade.go
+++ b/pkg/daemon/ceph/client/upgrade.go
@@ -27,6 +27,7 @@ import (
 // CephDaemonsVersions is a structure that can be used to parsed the output of the 'ceph versions' command
 type CephDaemonsVersions struct {
 	Mon     map[string]int `json:"mon,omitempty"`
+	Osd     map[string]int `json:"osd,omitempty"`
 	Mgr     map[string]int `json:"mgr,omitempty"`
 	Mds     map[string]int `json:"mds,omitempty"`
 	Overall map[string]int `json:"overall,omitempty"`
@@ -95,3 +96,14 @@ func EnableMessenger2(context *clusterd.Context) error {
 
 	return nil
 }
+
+// EnableNautilusOSD disallows pre-Nautilus OSDs and enables all new Nautilus-only functionality
+func EnableNautilusOSD(context *clusterd.Context) error {
+	_, err := context.Executor.ExecuteCommandWithOutput(false, "", "ceph", "osd", "require-osd-release", "nautilus")
+	if err != nil {
+		return fmt.Errorf("failed to disallow pre-nautilus osds and enable all new nautilus-only functionality: %+v", err)
+	}
+	logger.Infof("successfully disallowed pre-nautilus osds and enabled all new nautilus-only functionality")
+
+	return nil
+}
diff --git a/pkg/daemon/ceph/client/upgrade_test.go b/pkg/daemon/ceph/client/upgrade_test.go
index 17de5d973..af2ede739 100644
--- a/pkg/daemon/ceph/client/upgrade_test.go
+++ b/pkg/daemon/ceph/client/upgrade_test.go
@@ -63,3 +63,18 @@ func TestEnableMessenger2(t *testing.T) {
 	err := EnableMessenger2(context)
 	assert.Nil(t, err)
 }
+
+func TestEnableNautilusOSD(t *testing.T) {
+	executor := &exectest.MockExecutor{}
+	executor.MockExecuteCommandWithOutput = func(debug bool, name string, command string, args ...string) (string, error) {
+		assert.Equal(t, "osd", args[0])
+		assert.Equal(t, "require-osd-release", args[1])
+		assert.Equal(t, "nautilus", args[2])
+		assert.Equal(t, 3, len(args))
+		return "", nil
+	}
+	context := &clusterd.Context{Executor: executor}
+
+	err := EnableNautilusOSD(context)
+	assert.Nil(t, err)
+}
diff --git a/pkg/operator/ceph/cluster/osd/osd.go b/pkg/operator/ceph/cluster/osd/osd.go
index e7410dc52..5ef63ce86 100644
--- a/pkg/operator/ceph/cluster/osd/osd.go
+++ b/pkg/operator/ceph/cluster/osd/osd.go
@@ -30,6 +30,7 @@ import (
 	cephconfig "github.com/rook/rook/pkg/daemon/ceph/config"
 	osdconfig "github.com/rook/rook/pkg/operator/ceph/cluster/osd/config"
 	opspec "github.com/rook/rook/pkg/operator/ceph/spec"
+	cephver "github.com/rook/rook/pkg/operator/ceph/version"
 	"github.com/rook/rook/pkg/operator/k8sutil"
 	"github.com/rook/rook/pkg/util/display"
 	apps "k8s.io/api/apps/v1"
@@ -187,6 +188,36 @@ func (c *Cluster) Start() error {
 			len(config.errorMessages), c.Namespace, strings.Join(config.errorMessages, "\n"))
 	}
 
+	// The following block is used to apply any command(s) required by an upgrade
+	// The block below handles the upgrade from Mimic to Nautilus.
+	if c.clusterInfo.CephVersion.IsAtLeastNautilus() {
+		versions, err := client.GetCephVersions(c.context)
+		if err != nil {
+			logger.Warningf("failed to get ceph daemons versions. this likely means there are no osds yet. %+v", err)
+		} else {
+			// If length is one, this clearly indicates that all the osds are running the same version
+			logger.Infof("len of version.Osd is %d", len(versions.Osd))
+			// If this is the first time we are creating a cluster length will be 0
+			// On an initial OSD boostrap, by the time we reach this code, the OSDs haven't registered yet
+			// Basically, this task is happening too quickly and OSD pods are not running yet.
+			// That's not an issue since it's an initial bootstrap and not an update.
+			if len(versions.Osd) == 1 {
+				for v := range versions.Osd {
+					logger.Infof("v is %s", v)
+					osdVersion, err := cephver.ExtractCephVersion(v)
+					if err != nil {
+						return fmt.Errorf("failed to extract ceph version. %+v", err)
+					}
+					logger.Infof("osdVersion is: %v", osdVersion)
+					// if the version of these OSDs is Nautilus then we run the command
+					if osdVersion.IsAtLeastNautilus() {
+						client.EnableNautilusOSD(c.context)
+					}
+				}
+			}
+		}
+	}
+
 	logger.Infof("completed running osds in namespace %s", c.Namespace)
 	return nil
 }