diff --git a/README.md b/README.md
index 03bd0f1..be1477c 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Instant messaging server matrix network.
 
 Yunohost chatroom with matrix : [https://riot.im/app/#/room/#yunohost:matrix.org](https://riot.im/app/#/room/#yunohost:matrix.org)
 
-**Shipped version:** 1.28.0
+**Shipped version:** 1.31.0
 
 ## Configuration
 
@@ -78,6 +78,29 @@ If you have a dynamic IP address, you also might need to update this config auto
 */15 * * * * root bash /opt/yunohost/__SYNAPSE_INSTANCE_NAME__/Coturn_config_rotate.sh;
 ```
 
+#### OpenVPN
+
+In case of you have an OpenVPN server you might want than `coturn-synapse` restart when the VPN restart. To do this create a file named `/usr/local/bin/openvpn_up_script.sh` with this content:
+```
+#!/bin/bash
+
+(
+    sleep 5
+    sudo systemctl restart coturn-synapse.service
+) &
+exit 0
+```
+
+Add this line in you sudo config file `/etc/sudoers`
+```
+openvpn    ALL=(ALL) NOPASSWD: /bin/systemctl restart coturn-synapse.service
+```
+
+And add this line in your OpenVPN config file
+```
+ipchange /usr/local/bin/openvpn_up_script.sh
+```
+
 ### Important Security Note
 
 We do not recommend running Element from the same domain name as your Matrix
diff --git a/check_process b/check_process
index fa6484d..c14412d 100644
--- a/check_process
+++ b/check_process
@@ -16,7 +16,7 @@
         upgrade=1   from_commit=35774cc0eabb82b03230210689fa060d5f2b0bd8
         upgrade=1   from_commit=dbf0a2c9359ccd62b55132cace548b17e44af9bf
         backup_restore=1
-        multi_instance=1
+        multi_instance=0
         incorrect_path=0
         port_already_use=1 (8448)
         change_url=0
diff --git a/conf/armv7_stretch.src b/conf/armv7_bullseye.src
similarity index 69%
rename from conf/armv7_stretch.src
rename to conf/armv7_bullseye.src
index 744d6fc..89e1144 100644
--- a/conf/armv7_stretch.src
+++ b/conf/armv7_bullseye.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/YunoHost-Apps/synapse_python_build/releases/download/v1.28.0/matrix-synapse_1.28.0-stretch-bin1_armv7l.tar.gz
-SOURCE_SUM=03078aa4a8a88609ab71e11f8503c83f5bbee8e4211f997318d7843438ac4db5
+SOURCE_URL=https://github.com/YunoHost-Apps/synapse_python_build/releases/download/v1.31.0/matrix-synapse_1.31.0-bullseye-bin1_armv7l.tar.gz
+SOURCE_SUM=edfe30078bae8fbe565e6e18f6c0859c81e1828862584a5135ac57f92e1f0c91
 # (Optional) Program to check the integrity (sha256sum, md5sum...)
 # default: sha256
 SOURCE_SUM_PRG=sha256sum
diff --git a/conf/armv7_buster.src b/conf/armv7_buster.src
index 3139bdb..ed0e09a 100644
--- a/conf/armv7_buster.src
+++ b/conf/armv7_buster.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/YunoHost-Apps/synapse_python_build/releases/download/v1.28.0/matrix-synapse_1.28.0-buster-bin1_armv7l.tar.gz
-SOURCE_SUM=9a3a0098953ee592f9c40fd98d1e54f0c5a369a27007667fbe4689cc0aa4bcc0
+SOURCE_URL=https://github.com/YunoHost-Apps/synapse_python_build/releases/download/v1.31.0/matrix-synapse_1.31.0-buster-bin1_armv7l.tar.gz
+SOURCE_SUM=877bb0812bd133b4f4c6745b1c5dc441dcd919f65de8a53d348fd00b99e74660
 # (Optional) Program to check the integrity (sha256sum, md5sum...)
 # default: sha256
 SOURCE_SUM_PRG=sha256sum
diff --git a/conf/nginx.conf b/conf/nginx.conf
index a08a7b7..9b12af0 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -1,6 +1,7 @@
 location __PATH__ {
         proxy_pass http://localhost:__PORT__;
         proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
 
         client_max_body_size 100M;
 
diff --git a/manifest.json b/manifest.json
index 5f1c968..3228ee2 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
 		"en": "Instant messaging server which uses Matrix",
 		"fr": "Un serveur de messagerie instantané basé sur Matrix"
 	},
-	"version": "1.28.0~ynh2",
+	"version": "1.31.0~ynh1",
 	"url": "http://matrix.org",
 	"license": "Apache-2.0",
 	"maintainer": {
diff --git a/scripts/_common.sh b/scripts/_common.sh
index f760389..79a4564 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -40,27 +40,29 @@ install_sources() {
         if [ -e $final_path/.rustup ]; then
             sudo -u "$synapse_user" env PATH=$PATH rustup update
         else
-            sudo -u "$synapse_user" bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain=stable'
+            sudo -u "$synapse_user" bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain=stable --profile=minimal'
         fi
-    
+
         # Install virtualenv if it don't exist
         test -e $final_path/bin/python3 || python3 -m venv $final_path
 
         # Install synapse in virtualenv
 
         # We set all necessary environement variable to create a python virtualenvironnement.
-        set +u;
+        u_arg='u'
+        set  +$u_arg;
         source $final_path/bin/activate
-        set -u;
+        set  -$u_arg;
         pip3 install --upgrade setuptools wheel
         chown $synapse_user:root -R $final_path
         sudo -u $synapse_user env PATH=$PATH pip3 install --upgrade 'cryptography>=3.3'
         pip3 install --upgrade cffi ndg-httpsclient psycopg2 lxml jinja2
-        pip3 install --upgrade 'Twisted>=20.3.0<21' matrix-synapse==$upstream_version matrix-synapse-ldap3
+        # Fix issue https://github.com/YunoHost-Apps/synapse_ynh/issues/248
+        pip3 install --upgrade 'Twisted>=21' 'treq>=21.1.0' matrix-synapse==$upstream_version matrix-synapse-ldap3
 
         # This function was defined when we called "source $final_path/bin/activate". With this function we undo what "$final_path/bin/activate" does
-        set +u;
+        set  +$u_arg;
         deactivate
-        set -u;
+        set  -$u_arg;
     fi
 }
diff --git a/scripts/install b/scripts/install
index 9e5bb73..9a1184c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -342,7 +342,7 @@ ynh_add_config --template="../sources/update_synapse_for_appservice.sh" --destin
 ynh_script_progression --message="Configuring permissions..." --weight=1
 
 ynh_permission_url --permission=main --url=$domain/_matrix/cas_server.php/login --auth_header=true
-ynh_permission_update --permission=main --label="Synapse server SSO authentication" --show_tile=false --protected=true
+ynh_permission_update --permission=main --show_tile=false --protected=true
 
 ynh_permission_create --permission=server_api --url=$domain/_matrix --additional_urls=$server_name/.well-known/matrix \
                       --label="Server access for client apps." --show_tile=false --allowed=visitors \
diff --git a/scripts/upgrade b/scripts/upgrade
index 63f92bc..174a103 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -405,7 +405,7 @@ ynh_script_progression --message="Configuring permissions..." --weight=1
 ynh_legacy_permissions_delete_all
 
 ynh_permission_url --permission=main --url=$domain/_matrix/cas_server.php/login --auth_header=true
-ynh_permission_update --permission=main --label="Synapse server SSO authentication" --show_tile=false --protected=true
+ynh_permission_update --permission=main --show_tile=false --protected=true
 
 if ! ynh_permission_exists --permission=server_api; then
     ynh_permission_create --permission=server_api --url=$domain/_matrix --additional_urls=$server_name/.well-known/matrix \