diff --git a/README.md b/README.md
index fb5f72b..8282a06 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 
 Web interface for voice chat software (VoIP)
 
-**Shipped version:** 1.3.0~ynh2
+**Shipped version:** 1.3.0~ynh3
 
 **Demo:** https://web.mumble.framatalk.org/
 
diff --git a/README_fr.md b/README_fr.md
index 3bda1bb..d5b7bc6 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -13,7 +13,7 @@ Si vous n'avez pas YunoHost, regardez [ici](https://yunohost.org/#/install) pour
 
 Interface web interface pour voix sur IP (VoIP)
 
-**Version incluse :** 1.3.0~ynh2
+**Version incluse :** 1.3.0~ynh3
 
 **Démo :** https://web.mumble.framatalk.org/
 
diff --git a/conf/systemd.service b/conf/systemd.service
index 11c39ae..df7f518 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -11,5 +11,35 @@ Environment="PATH=__ENV_PATH__"
 Environment=NODE_ENV=production
 ExecStart=/usr/bin/websockify --web=__FINALPATH__/dist/ --ssl-target 127.0.0.1:__PORT__ 127.0.0.1:64738
 
+# Sandboxing options to harden security
+# Depending on specificities of your service/app, you may need to tweak these 
+# .. but this should be a good baseline
+# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
+NoNewPrivileges=yes
+PrivateTmp=yes
+PrivateDevices=yes
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
+RestrictNamespaces=yes
+RestrictRealtime=yes
+DevicePolicy=closed
+ProtectSystem=full
+ProtectControlGroups=yes
+ProtectKernelModules=yes
+ProtectKernelTunables=yes
+LockPersonality=yes
+SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap
+
+# Denying access to capabilities that should not be relevant for webapps
+# Doc: https://man7.org/linux/man-pages/man7/capabilities.7.html
+CapabilityBoundingSet=~CAP_RAWIO CAP_MKNOD
+CapabilityBoundingSet=~CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_AUDIT_WRITE
+CapabilityBoundingSet=~CAP_SYS_BOOT CAP_SYS_TIME CAP_SYS_MODULE CAP_SYS_PACCT
+CapabilityBoundingSet=~CAP_LEASE CAP_LINUX_IMMUTABLE CAP_IPC_LOCK
+CapabilityBoundingSet=~CAP_BLOCK_SUSPEND CAP_WAKE_ALARM
+CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG
+CapabilityBoundingSet=~CAP_MAC_ADMIN CAP_MAC_OVERRIDE
+CapabilityBoundingSet=~CAP_NET_ADMIN CAP_NET_BROADCAST CAP_NET_RAW
+CapabilityBoundingSet=~CAP_SYS_ADMIN CAP_SYS_PTRACE CAP_SYSLOG 
+
 [Install]
 WantedBy=multi-user.target
diff --git a/manifest.json b/manifest.json
index b7ee1ad..f257207 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Web interface for voice chat software (VoIP)",
         "fr": "Interface web interface pour voix sur IP (VoIP)"
     },
-    "version": "1.3.0~ynh2",
+    "version": "1.3.0~ynh3",
     "url": "https://mumble.info",
     "upstream": {
         "license": "BSD-3-Clause",