diff --git a/main_test.go b/main_test.go
index 5414310..b2978c7 100644
--- a/main_test.go
+++ b/main_test.go
@@ -40,15 +40,27 @@ const (
 	sentinelPort3      = "9128"
 )
 
+const (
+	aclSentinelUsername = "sentinel-user"
+	aclSentinelPassword = "sentinel-pass"
+	aclSentinelName     = "my_server"
+	aclServerPort       = "10001"
+	aclSentinelPort1    = "10002"
+	aclSentinelPort2    = "10003"
+	aclSentinelPort3    = "10004"
+)
+
 var (
 	sentinelAddrs = []string{":" + sentinelPort1, ":" + sentinelPort2, ":" + sentinelPort3}
+	aclSentinelAddrs = []string {":" + aclSentinelPort1, ":" + aclSentinelPort2, ":" + aclSentinelPort3}
 
 	processes map[string]*redisProcess
 
-	redisMain                                      *redisProcess
+	redisMain, aclServer                           *redisProcess
 	ringShard1, ringShard2, ringShard3             *redisProcess
 	sentinelMaster, sentinelSlave1, sentinelSlave2 *redisProcess
 	sentinel1, sentinel2, sentinel3                *redisProcess
+	aclSentinel1, aclSentinel2, aclSentinel3       *redisProcess
 )
 
 var cluster = &clusterScenario{
@@ -101,6 +113,18 @@ var _ = BeforeSuite(func() {
 	Expect(err).NotTo(HaveOccurred())
 
 	Expect(startCluster(ctx, cluster)).NotTo(HaveOccurred())
+
+	aclServer, err = startRedis(aclServerPort)
+	Expect(err).NotTo(HaveOccurred())
+
+	aclSentinel1, err = startSentinelWithAcl(aclSentinelPort1, aclSentinelName, aclServerPort)
+	Expect(err).NotTo(HaveOccurred())
+
+	aclSentinel2, err = startSentinelWithAcl(aclSentinelPort2, aclSentinelName, aclServerPort)
+	Expect(err).NotTo(HaveOccurred())
+
+	aclSentinel3, err = startSentinelWithAcl(aclSentinelPort3, aclSentinelName, aclServerPort)
+	Expect(err).NotTo(HaveOccurred())
 })
 
 var _ = AfterSuite(func() {
@@ -364,6 +388,28 @@ func startSentinel(port, masterName, masterPort string) (*redisProcess, error) {
 	return p, nil
 }
 
+func startSentinelWithAcl(port, masterName, masterPort string) (*redisProcess, error) {
+	process, err := startSentinel(port, masterName, masterPort)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, cmd := range []*redis.StatusCmd{
+		redis.NewStatusCmd(ctx, "ACL", "SETUSER", aclSentinelUsername, "ON", ">" + aclSentinelPassword, "-@all",
+			"+auth", "+client|getname", "+client|id", "+client|setname", "+command", "+hello", "+ping", "+role",
+			"+sentinel|get-master-addr-by-name", "+sentinel|master", "+sentinel|myid", "+sentinel|replicas",
+			"+sentinel|sentinels"),
+	} {
+		process.Client.Process(ctx, cmd)
+		if err := cmd.Err(); err != nil {
+			process.Kill()
+			return nil, err
+		}
+	}
+
+	return process, nil
+}
+
 //------------------------------------------------------------------------------
 
 type badConnError string
diff --git a/sentinel.go b/sentinel.go
index 7b53fd4..ec6221d 100644
--- a/sentinel.go
+++ b/sentinel.go
@@ -23,7 +23,13 @@ type FailoverOptions struct {
 	MasterName string
 	// A seed list of host:port addresses of sentinel nodes.
 	SentinelAddrs []string
-	// Sentinel password from "requirepass <password>" (if enabled) in Sentinel configuration
+
+	// If specified with SentinelPassword, enables ACL-based authentication (via
+	// AUTH <user> <pass>).
+	SentinelUsername string
+	// Sentinel password from "requirepass <password>" (if enabled) in Sentinel
+	// configuration, or, if SentinelUsername is also supplied, used for ACL-based
+	// authentication.
 	SentinelPassword string
 
 	// Allows routing read-only commands to the closest master or slave node.
@@ -109,6 +115,7 @@ func (opt *FailoverOptions) sentinelOptions(addr string) *Options {
 		OnConnect: opt.OnConnect,
 
 		DB:       0,
+		Username: opt.SentinelUsername,
 		Password: opt.SentinelPassword,
 
 		MaxRetries:      opt.MaxRetries,
diff --git a/sentinel_test.go b/sentinel_test.go
index 754f33d..c62950e 100644
--- a/sentinel_test.go
+++ b/sentinel_test.go
@@ -212,3 +212,62 @@ var _ = Describe("NewFailoverClusterClient", func() {
 		Expect(err).NotTo(HaveOccurred())
 	})
 })
+
+var _ = Describe("SentinelAclAuth", func() {
+	var client *redis.Client
+	var server *redis.Client
+	var sentinel *redis.SentinelClient
+
+	BeforeEach(func() {
+		client = redis.NewFailoverClient(&redis.FailoverOptions{
+			MasterName: aclSentinelName,
+			SentinelAddrs: aclSentinelAddrs,
+			MaxRetries: -1,
+			SentinelUsername: aclSentinelUsername,
+			SentinelPassword: aclSentinelPassword,
+		})
+
+		Expect(client.FlushDB(ctx).Err()).NotTo(HaveOccurred())
+
+		sentinel = redis.NewSentinelClient(&redis.Options{
+			Addr: aclSentinelAddrs[0],
+			MaxRetries: -1,
+			Username: aclSentinelUsername,
+			Password: aclSentinelPassword,
+		})
+
+		addr, err := sentinel.GetMasterAddrByName(ctx, aclSentinelName).Result()
+		Expect(err).NotTo(HaveOccurred())
+
+		server = redis.NewClient(&redis.Options{
+			Addr:       net.JoinHostPort(addr[0], addr[1]),
+			MaxRetries: -1,
+		})
+
+		// Wait until sentinels are picked up by each other.
+		Eventually(func() string {
+			return aclSentinel1.Info(ctx).Val()
+		}, "15s", "100ms").Should(ContainSubstring("sentinels=3"))
+		Eventually(func() string {
+			return aclSentinel2.Info(ctx).Val()
+		}, "15s", "100ms").Should(ContainSubstring("sentinels=3"))
+		Eventually(func() string {
+			return aclSentinel3.Info(ctx).Val()
+		}, "15s", "100ms").Should(ContainSubstring("sentinels=3"))
+	})
+
+	AfterEach(func() {
+		_ = client.Close()
+		_ = server.Close()
+		_ = sentinel.Close()
+	})
+
+	It("should still facilitate operations", func() {
+		err := client.Set(ctx, "wow", "acl-auth", 0).Err()
+		Expect(err).NotTo(HaveOccurred())
+
+		val, err := client.Get(ctx, "wow").Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(val).To(Equal("acl-auth"))
+	})
+})
\ No newline at end of file