diff --git a/vendor.conf b/vendor.conf
index 8e79ef9a20..ac68294fb4 100644
--- a/vendor.conf
+++ b/vendor.conf
@@ -142,7 +142,7 @@ github.com/klauspost/compress                       a3b7545c88eea469c2246bee0e6c
 github.com/pelletier/go-toml                        65ca8064882c8c308e5c804c5d5443d409e0738c # v1.8.1
 
 # cluster
-github.com/docker/swarmkit                          2dcf70aafdc9ea55af3aaaeca440638cde0ecda6  # master
+github.com/docker/swarmkit                          3629f50980f6c0dd5ccd7dbfa0956b57ea0cd78d  # master
 github.com/gogo/protobuf                            b03c65ea87cdc3521ede29f62fe3ce239267c1bc # v1.3.2
 github.com/golang/protobuf                          84668698ea25b64748563aa20726db66a6b8d299 # v1.3.5
 github.com/cloudflare/cfssl                         5d63dbd981b5c408effbb58c442d54761ff94fbd # 1.3.2
diff --git a/vendor/github.com/docker/swarmkit/manager/state/raft/raft.go b/vendor/github.com/docker/swarmkit/manager/state/raft/raft.go
index ec1d7f0afc..9d744b35e1 100644
--- a/vendor/github.com/docker/swarmkit/manager/state/raft/raft.go
+++ b/vendor/github.com/docker/swarmkit/manager/state/raft/raft.go
@@ -7,6 +7,8 @@ import (
 	"math"
 	"math/rand"
 	"net"
+	"os"
+	"runtime"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -15,7 +17,6 @@ import (
 	"github.com/coreos/etcd/pkg/idutil"
 	"github.com/coreos/etcd/raft"
 	"github.com/coreos/etcd/raft/raftpb"
-	"github.com/docker/docker/pkg/signal"
 	"github.com/docker/go-events"
 	"github.com/docker/go-metrics"
 	"github.com/docker/swarmkit/api"
@@ -594,7 +595,7 @@ func (n *Node) Run(ctx context.Context) error {
 				transferLeadershipLimit.Allow() {
 				log.G(ctx).Error("Attempting to transfer leadership")
 				if !n.opts.DisableStackDump {
-					signal.DumpStacks("")
+					stackDump()
 				}
 				transferee, err := n.transport.LongestActive()
 				if err != nil {
@@ -2131,3 +2132,21 @@ func getIDs(snap *raftpb.Snapshot, ents []raftpb.Entry) []uint64 {
 func (n *Node) reqTimeout() time.Duration {
 	return 5*time.Second + 2*time.Duration(n.Config.ElectionTick)*n.opts.TickInterval
 }
+
+// stackDump outputs the runtime stack to os.StdErr.
+//
+// It is based on Moby's stack.Dump(); https://github.com/moby/moby/blob/471fd27709777d2cce3251129887e14e8bb2e0c7/pkg/stack/stackdump.go#L41-L57
+func stackDump() {
+	var (
+		buf       []byte
+		stackSize int
+	)
+	bufferLen := 16384
+	for stackSize == len(buf) {
+		buf = make([]byte, bufferLen)
+		stackSize = runtime.Stack(buf, true)
+		bufferLen *= 2
+	}
+	buf = buf[:stackSize]
+	_, _ = os.Stderr.Write(buf)
+}
diff --git a/vendor/github.com/docker/swarmkit/vendor.conf b/vendor/github.com/docker/swarmkit/vendor.conf
index e1c8214a7b..fe8a3cd498 100644
--- a/vendor/github.com/docker/swarmkit/vendor.conf
+++ b/vendor/github.com/docker/swarmkit/vendor.conf
@@ -31,7 +31,7 @@ github.com/prometheus/procfs                        46159f73e74d1cb8dc223deef9b2
 github.com/cespare/xxhash/v2                        d7df74196a9e781ede915320c11c378c1b2f3a1f # v2.1.1
 
 github.com/docker/distribution                      0d3efadf0154c2b8a4e7b6621fff9809655cc580
-github.com/docker/docker                            0ad2293d0e5bbf4c966a0e8b27c3ac3835265577 # master / v21.xx-dev
+github.com/docker/docker                            471fd27709777d2cce3251129887e14e8bb2e0c7 # master / v21.xx-dev
 github.com/docker/go-connections                    7395e3f8aa162843a74ed6d48e79627d9792ac55 # v0.4.0
 github.com/docker/go-events                         e31b211e4f1cd09aa76fe4ac244571fab96ae47f
 github.com/docker/go-units                          519db1ee28dcc9fd2474ae59fca29a810482bfb1 # v0.4.0