Upgrade not working

Expected behavior

Following the guide we had tried to update swarm installation, with lastet stable release

upgrade.sh https://download.docker.com/azure/stable/Docker.tmpl

Actual behavior

The process finish ok, but the docker engine version continues to be the existent. No upgrade was made.

Current Server Version: 1.13.0-rc4

Additional Information

swarm-manager000000:~$ docker info
Containers: 6
 Running: 5
 Paused: 0
 Stopped: 1
Images: 7
Server Version: 1.13.0-rc4
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: true
Logging Driver: syslog
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host ipvlan macvlan null overlay
Swarm: active
 NodeID: 6yydgmb0cmmhwrzt08oq46vg9
 Is Manager: true
 ClusterID: 5l5lth7kmyy2028rdqe4zmqat
 Managers: 1
 Nodes: 3
 Orchestration:
  Task History Retention Limit: 5
 Raft:
  Snapshot Interval: 10000
  Number of Old Snapshots to Retain: 0
  Heartbeat Tick: 1
  Election Tick: 3
 Dispatcher:
  Heartbeat Period: 5 seconds
 CA Configuration:
  Expiry Duration: 3 months
 Node Address: 10.0.0.6
 Manager Addresses:
  10.0.0.6:2377
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 03e5862ec0d8d3b3f750e19fca3ee367e13c090e
runc version: 51371867a01c467f08af739783b8beafc154c4d7
init version: 949e6fa
Security Options:
 seccomp
  Profile: default
Kernel Version: 4.9.0-moby
Operating System: Alpine Linux v3.4
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 3.354 GiB
Name: swarm-manager000000
ID: FRQU:DKKX:M2RP:GYP4:7KDZ:KJOG:QSRH:SKJP:G2XR:MXHI:JX3R:XM2U
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): true
 File Descriptors: 69
 Goroutines: 171
 System Time: 2017-02-23T13:17:09.030012314Z
 EventsListeners: 0
Registry: https://index.docker.io/v1/
Experimental: true
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false