diff --git a/README.md b/README.md
index ad9920fa..eb78c8f1 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ this package:
  * Serve `/.well-known` paths for CalDAV and CardDAV on the domain only if it's not already served - i.e. by Baïkal
 
 
-**Shipped version:** 25.0.4~ynh1
+**Shipped version:** 26.0.2~ynh3
 
 **Demo:** https://demo.nextcloud.com/
 
diff --git a/README_fr.md b/README_fr.md
index 6bced778..8ab49432 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -29,7 +29,7 @@ En plus des fonctionnalités principales de Nextcloud, les fonctionnalités suiv
  * Utilise l'adresse `/.well-known` pour la synchronisation CalDAV et CardDAV du domaine si aucun autre service ne l'utilise déjà - par exemple, Baïkal
 
 
-**Version incluse :** 25.0.4~ynh1
+**Version incluse :** 26.0.2~ynh3
 
 **Démo :** https://demo.nextcloud.com/
 
diff --git a/actions.toml b/actions.toml
deleted file mode 100644
index fc6cb0fc..00000000
--- a/actions.toml
+++ /dev/null
@@ -1,17 +0,0 @@
-[disable_maintenance]
-name = "Disable the maintenance mode of Nextcloud"
-command = "/bin/bash scripts/actions/disable_maintenance"
-# user = "root"  # optional
-# cwd = "/" # optional
-# accepted_return_codes = [0, 1, 2, 3]  # optional
-accepted_return_codes = [0]
-description = "Disable the maintenance mode of Nextcloud if you're stuck after an upgrade"
-
-[add_multimedia_directories]
-name = "Add multimedia directories"
-command = "/bin/bash scripts/actions/add_multimedia_directories"
-# user = "root"  # optional
-# cwd = "/" # optional
-# accepted_return_codes = [0, 1, 2, 3]  # optional
-accepted_return_codes = [0]
-description = "Add the multimedia and shared multimedia directories again"
diff --git a/conf/nginx.conf b/conf/nginx.conf
index d6b7aa9a..a9fb919c 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -28,7 +28,7 @@ location ^~ __PATH__/ {
   more_set_headers "X-Download-Options: noopen";
   more_set_headers "X-Frame-Options: SAMEORIGIN";
   more_set_headers "X-Permitted-Cross-Domain-Policies: none";
-  more_set_headers "X-Robots-Tag: none";
+  more_set_headers "X-Robots-Tag: noindex, nofollow";
   more_set_headers "X-XSS-Protection: 1; mode=block";
 
   # Set max upload size
@@ -77,7 +77,7 @@ location ^~ __PATH__/ {
 
   # Rules borrowed from `.htaccess` to hide certain paths from clients
   location ~ ^__PATH__/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/)    { return 404; }
-  location ~ ^__PATH__/(?:\.|autotest|occ|issue|indie|db_|console)                { return 404; }
+  location ~ ^__PATH__/(?:\.|autotest|occ|issue|indie|db_|console)                  { return 404; }
 
   # Ensure this block, which passes PHP files to the PHP process, is above the blocks
   # which handle static assets (as seen below). If this block is not declared first,
@@ -88,14 +88,17 @@ location ^~ __PATH__/ {
     # https://github.com/nextcloud/documentation/pull/2197#issuecomment-721432337
     # This line fix the ldap admin page
     rewrite ^__PATH__/(?!index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy) __PATH__/index.php$request_uri;
+    
     fastcgi_split_path_info ^(.+?\.php)(/.*)$;
     set $path_info $fastcgi_path_info;
+    
     try_files $fastcgi_script_name =404;
+    
     include fastcgi_params;
-
     fastcgi_param SCRIPT_FILENAME $request_filename;
     fastcgi_param PATH_INFO $path_info;
     fastcgi_param HTTPS on;
+
     fastcgi_param modHeadersAvailable true;         # Avoid sending the security headers twice
     fastcgi_param front_controller_active true;     # Enable pretty urls
     fastcgi_param HTTP_ACCEPT_ENCODING "";          # Disable encoding of nextcloud response to inject ynh scripts
@@ -104,10 +107,19 @@ location ^~ __PATH__/ {
     fastcgi_request_buffering off;
   }
 
-  location ~ \.(?:css|js|svg|gif)$ {
+  location ~ ^__PATH__/(?:updater|oc[ms]-provider)(?:$|/) {
+       try_files $uri/ =404;
+       index index.php;
+  }
+
+  location ~ \.(?:css|js|svg|gif|png|jpg|ico|wasm|tflite|map)$ {
     try_files $uri / __PATH__/index.php$request_uri;
     expires 6M;         # Cache-Control policy borrowed from `.htaccess`
     access_log off;     # Optional: Don't log access to assets
+
+    location ~ \.wasm$ {
+            default_type application/wasm;
+    }
   }
 
   location ~ \.woff2?$ {
diff --git a/manifest.json b/manifest.json
index 93e5670c..fdcd515b 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Online storage, file sharing platform and various other applications",
         "fr": "Stockage en ligne, plateforme de partage de fichiers et diverses autres applications"
     },
-    "version": "25.0.4~ynh1",
+    "version": "26.0.2~ynh3",
     "url": "https://nextcloud.com",
     "upstream": {
         "license": "AGPL-3.0",
@@ -23,7 +23,7 @@
         "email": "pierre@kayou.io"
     },
     "requirements": {
-        "yunohost": ">= 11.0.9"
+        "yunohost": ">= 11.1.15"
     },
     "multi_instance": true,
     "services": [
@@ -51,8 +51,8 @@
                 "name": "is_public",
                 "type": "boolean",
                 "help": {
-                    "en": "If enabled, Nextcloud will be accessible by Nextcloud Desktop and by users without a YunoHost account. This can be changed later in the webadmin.",
-                    "fr": "Si cette case est cochée, Nextcloud sera accessible par Nextcloud Desktop et par les utilisateurs n’ayant pas de compte YunoHost. Vous pourrez changer dans la webadmin."
+                    "en": "You need to enable public if you want to connect Nextcloud Desktop client to Nextcloud server. This can be changed later via the webadmin.",
+                    "fr": "Vous devez cocher cette case si vous souhaitez connecter le client Nextcloud Desktop au serveur Nextcloud. Cela peut être modifié ultérieurement via l'administrateur Web."
                 },
                 "default": true
             },
diff --git a/scripts/_ynh_mysql_connect_as.sh b/scripts/_ynh_mysql_connect_as.sh
new file mode 100644
index 00000000..a22963e8
--- /dev/null
+++ b/scripts/_ynh_mysql_connect_as.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Open a connection as a user
+#
+# example: ynh_mysql_connect_as --user="user" --password="pass" <<< "UPDATE ...;"
+# example: ynh_mysql_connect_as --user="user" --password="pass" --default_character_set="utf8mb4" < /path/to/file.sql
+#
+# usage: ynh_mysql_connect_as --user=user --password=password [--database=database] [--default_character_set=character-set]
+# | arg: -u, --user=                        - the user name to connect as
+# | arg: -p, --password=                    - the user password
+# | arg: -d, --database=                    - the database to connect to
+# | arg: -c, --default_character_set=       - the charset to use
+#
+# Requires YunoHost version 2.2.4 or higher.
+ynh_mysql_connect_as() {
+    # Declare an array to define the options of this helper.
+    local legacy_args=updc
+    local -A args_array=( [u]=user= [p]=password= [d]=database= [c]=default_character_set= )
+    local user
+    local password
+    local database
+    local default_character_set
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+    database="${database:-}"
+    default_character_set="${default_character_set:-}"
+
+    if [ -n "$default_character_set" ]
+    then
+        default_character_set="--default-character-set=$default_character_set"
+    else
+        default_character_set="--default-character-set=latin1"
+    fi
+
+    mysql --user="$user" --password="$password" "$default_character_set" --batch "$database"
+}
\ No newline at end of file
diff --git a/scripts/_ynh_mysql_dump_db.sh b/scripts/_ynh_mysql_dump_db.sh
new file mode 100644
index 00000000..3b922bb8
--- /dev/null
+++ b/scripts/_ynh_mysql_dump_db.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Dump a database
+#
+# example: ynh_mysql_dump_db --database=roundcube --default_character_set="utf8mb4" > ./dump.sql
+#
+# usage: ynh_mysql_dump_db --database=database
+# | arg: -d, --database=                    - the database name to dump
+# | arg: -c, --default_character_set=       - the charset to use
+# | ret: the mysqldump output
+#
+# Requires YunoHost version 2.2.4 or higher.
+ynh_mysql_dump_db() {
+    # Declare an array to define the options of this helper.
+    local legacy_args=dc
+    local -A args_array=( [d]=database= [c]=default_character_set= )
+    local database
+    local default_character_set
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+    default_character_set="${default_character_set:-}"
+    MYSQL_ROOT_PWD_FILE=/etc/yunohost/mysql
+
+    if [ -n "$default_character_set" ]
+    then
+        default_character_set="--default-character-set=$default_character_set"
+    else
+        # By default, default character set is "latin1"
+        default_character_set="--default-character-set=latin1"
+    fi
+    
+    if [ -f "$MYSQL_ROOT_PWD_FILE" ]; then
+        mysqldump --user="root" --password="$(cat $MYSQL_ROOT_PWD_FILE)" --single-transaction --skip-dump-date "$default_character_set" "$database"
+    else
+        mysqldump --single-transaction --skip-dump-date "$default_character_set" "$database"
+    fi
+}
\ No newline at end of file
diff --git a/scripts/actions/add_multimedia_directories b/scripts/actions/add_multimedia_directories
deleted file mode 100755
index 8b5a9aff..00000000
--- a/scripts/actions/add_multimedia_directories
+++ /dev/null
@@ -1,66 +0,0 @@
-#!/bin/bash
-
-#=================================================
-# GENERIC STARTING
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
-source scripts/_common.sh
-source /usr/share/yunohost/helpers
-
-#=================================================
-# RETRIEVE ARGUMENTS
-#=================================================
-
-app=$YNH_APP_INSTANCE_NAME
-
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-
-#=================================================
-# CHECK IF ARGUMENTS ARE CORRECT
-#=================================================
-
-#=================================================
-# DEFINE FUNCTION
-#=================================================
-
-# Define a function to execute commands with `occ`
-exec_occ() {
-  (cd "$final_path" && exec_as "$app" \
-      php$YNH_PHP_VERSION --define apc.enable_cli=1 occ --no-interaction --no-ansi "$@")
-}
-
-# Define a function to add an external storage
-# Create the external storage for the given folders and enable sharing
-create_external_storage() {
-local datadir="$1"
-local mount_name="$2"
-local mount_id=`exec_occ files_external:create --output=json \
-    "$mount_name" 'local' 'null::null' -c "datadir=$datadir" || true`
-! [[ $mount_id =~ ^[0-9]+$ ]] \
-    && ynh_print_warn --message="Unable to create external storage" \
-    || exec_occ files_external:option "$mount_id" enable_sharing true
-}
-
-#=================================================
-# SPECIFIC ACTION
-#=================================================
-# YUNOHOST MULTIMEDIA INTEGRATION
-#=================================================
-ynh_script_progression --message="Updating multimedia directories..." --weight=6
-
-# Build YunoHost multimedia directories
-ynh_multimedia_build_main_dir
-# Mount the user directory in Nextcloud
-exec_occ app:enable files_external
-create_external_storage "/home/yunohost.multimedia/\$user" "Multimedia"
-create_external_storage "/home/yunohost.multimedia/share" "Shared multimedia"
-# Allow nextcloud to write into these directories
-ynh_multimedia_addaccess $app
-
-#=================================================
-# END OF SCRIPT
-#=================================================
-
-ynh_script_progression --message="Execution completed" --last
diff --git a/scripts/actions/disable_maintenance b/scripts/actions/disable_maintenance
deleted file mode 100755
index 60e8738e..00000000
--- a/scripts/actions/disable_maintenance
+++ /dev/null
@@ -1,52 +0,0 @@
-#!/bin/bash
-
-#=================================================
-# GENERIC STARTING
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
-source scripts/_common.sh
-source /usr/share/yunohost/helpers
-
-#=================================================
-# RETRIEVE ARGUMENTS
-#=================================================
-
-app=$YNH_APP_INSTANCE_NAME
-
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-
-#=================================================
-# CHECK IF ARGUMENTS ARE CORRECT
-#=================================================
-
-#=================================================
-# CHECK IF AN ACTION HAS TO BE DONE
-#=================================================
-
-# Check the current status of the maintenance mode
-
-if [ "$(grep "maintenance" "$final_path/config/config.php" | awk '{print $3}' | cut -d',' -f1)" != "true" ]
-then
-    ynh_die --message="Nextcloud isn't currently under maintenance." --ret_code=0
-fi
-
-#=================================================
-# SPECIFIC ACTION
-#=================================================
-# DISABLE THE MAINTENANCE MODE
-#=================================================
-
-ynh_script_progression --message="Disabling maintenance mode..." --weight=3
-
-(
-cd "$final_path" && exec_as "$app" \
-    php$YNH_PHP_VERSION --define apc.enable_cli=1 occ --no-interaction --no-ansi maintenance:mode --off
-)
-
-#=================================================
-# END OF SCRIPT
-#=================================================
-
-ynh_script_progression --message="Execution completed" --last
diff --git a/scripts/backup b/scripts/backup
index ebf77613..486c1eac 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -8,6 +8,7 @@
 
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
+source ../settings/scripts/_ynh_mysql_dump_db.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -57,7 +58,7 @@ ynh_backup --src_path="/etc/php/$phpversion/fpm/pool.d/$app.conf"
 #=================================================
 ynh_print_info --message="Backing up the MySQL database..."
 
-ynh_mysql_dump_db --database="$db_name" > db.sql
+ynh_mysql_dump_db --database="$db_name" --default_character_set="utf8mb4" > db.sql
 
 #=================================================
 # SPECIFIC BACKUP
diff --git a/scripts/install b/scripts/install
index 981c8be7..102e9840 100755
--- a/scripts/install
+++ b/scripts/install
@@ -8,6 +8,7 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
+source _ynh_mysql_connect_as.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -78,6 +79,9 @@ db_user=$db_name
 ynh_app_setting_set --app=$app --key=db_name --value=$db_name
 ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
 
+ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name \
+    <<< "ALTER DATABASE $db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -190,6 +194,9 @@ exec_occ maintenance:install \
 #=================================================
 ynh_script_progression --message="Configuring Nextcloud..." --weight=8
 
+# Set the mysql.utf8mb4 config to true in config.php
+exec_occ config:system:set mysql.utf8mb4 --type boolean --value="true"
+
 # Ensure that UpdateNotification app is disabled
 exec_occ app:disable updatenotification
 
@@ -275,7 +282,7 @@ exec_occ config:system:set overwrite.cli.url --value="https://${domain}"
 #=================================================
 
 # Set the user as admin
-ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name \
+ynh_mysql_connect_as --user=$db_name --password="$db_pwd" --database=$db_name --default_character_set="utf8mb4" \
     <<< "INSERT INTO oc_group_user VALUES ('admin','$admin');"
 # And delete admin user
 exec_occ user:delete admin
@@ -329,10 +336,10 @@ ynh_multimedia_addaccess $app
 # Fix app ownerships & permissions
 chown -R $app:www-data "$final_path"
 chown -R $app: "$datadir"
-find $final_path/ -type f -print0 | xargs -0 chmod 0644
-find $final_path/ -type d -print0 | xargs -0 chmod 0755
-find $datadir/ -type f -print0 | xargs -0 chmod 0640
-find $datadir/ -type d -print0 | xargs -0 chmod 0750
+find $final_path/ -type f -print0 | xargs -r0 chmod 0644
+find $final_path/ -type d -print0 | xargs -r0 chmod 0755
+find $datadir/ -type f -print0 | xargs -r0 chmod 0640
+find $datadir/ -type d -print0 | xargs -r0 chmod 0750
 chmod 640 "$final_path/config/config.php"
 chmod 755 /home/yunohost.app
 chmod 750 $final_path
diff --git a/scripts/restore b/scripts/restore
index 45c43f48..4603c603 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -8,6 +8,7 @@
 
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
+source ../settings/scripts/_ynh_mysql_connect_as.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -57,8 +58,11 @@ ynh_restore_file --origin_path="$final_path"
 ynh_script_progression --message="Restoring the MySQL database..." --weight=9
 
 db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
-ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
-ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
+ynh_mysql_setup_db --db_user=$db_name --db_name=$db_name --db_pwd=$db_pwd
+ynh_mysql_connect_as --user=$db_name --password="$db_pwd" --database=$db_name \
+    <<< "ALTER DATABASE $db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"
+
+ynh_mysql_connect_as --user=$db_name --password=$db_pwd --database=$db_name --default_character_set="utf8mb4" < ./db.sql
 
 #=================================================
 # RECREATE THE DEDICATED USER
@@ -137,10 +141,10 @@ mkdir -p "$datadir"
 # Fix app ownerships & permissions
 chown -R $app:www-data "$final_path"
 chown -R $app: "$datadir"
-find $final_path/ -type f -print0 | xargs -0 chmod 0644
-find $final_path/ -type d -print0 | xargs -0 chmod 0755
-find $datadir/ -type f -print0 | xargs -0 chmod 0640
-find $datadir/ -type d -print0 | xargs -0 chmod 0750
+find $final_path/ -type f -print0 | xargs -r0 chmod 0644
+find $final_path/ -type d -print0 | xargs -r0 chmod 0755
+find $datadir/ -type f -print0 | xargs -r0 chmod 0640
+find $datadir/ -type d -print0 | xargs -r0 chmod 0750
 chmod 640 "$final_path/config/config.php"
 chmod 755 /home/yunohost.app
 chmod 750 $final_path
diff --git a/scripts/upgrade b/scripts/upgrade
index 33fb4604..d965dff2 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -251,6 +251,15 @@ then
     # Print the current version number of Nextcloud
     exec_occ -V
 
+    if [ "$(exec_occ config:system:get mysql.utf8mb4)" != "true" ]; then
+        db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
+        # Change your databases character set and collation
+        ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name \
+        <<< "ALTER DATABASE $db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;"
+        # Set the mysql.utf8mb4 config to true in config.php
+        exec_occ config:system:set mysql.utf8mb4 --type boolean --value="true"
+        exec_occ maintenance:repair
+    fi
 
     # Upgrade may fail if this app is enabled
     # Take all apps enabled, and check if mail is one of them
@@ -443,10 +452,10 @@ exec_occ background:cron
 # Fix app ownerships & permissions
 chown -R $app:www-data "$final_path"
 chown -R $app: "$datadir"
-find $final_path/ -type f -print0 | xargs -0 chmod 0644
-find $final_path/ -type d -print0 | xargs -0 chmod 0755
-find $datadir/ -type f -print0 | xargs -0 chmod 0640
-find $datadir/ -type d -print0 | xargs -0 chmod 0750
+find $final_path/ -type f -print0 | xargs -r0 chmod 0644
+find $final_path/ -type d -print0 | xargs -r0 chmod 0755
+find $datadir/ -type f -print0 | xargs -r0 chmod 0640
+find $datadir/ -type d -print0 | xargs -r0 chmod 0750
 chmod 640 "$final_path/config/config.php"
 chmod 755 /home/yunohost.app
 chmod 750 $final_path
diff --git a/scripts/upgrade.d/upgrade.25.sh b/scripts/upgrade.d/upgrade.25.sh
new file mode 100644
index 00000000..fedd8f19
--- /dev/null
+++ b/scripts/upgrade.d/upgrade.25.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Last available Nextcloud version
+next_version="26.0.0"
+
+# Nextcloud tarball checksum sha256
+nextcloud_source_sha256="f163150363aee9366ecb5cd5259bf6756ed4f073cea78b5fa515cada7a0d0c3d"
diff --git a/scripts/upgrade.d/upgrade.last.sh b/scripts/upgrade.d/upgrade.last.sh
index ed2c9049..ba24f4f0 100644
--- a/scripts/upgrade.d/upgrade.last.sh
+++ b/scripts/upgrade.d/upgrade.last.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Last available Nextcloud version
-next_version="25.0.4"
+next_version="26.0.2"
 
 # Nextcloud tarball checksum sha256
-nextcloud_source_sha256="c3251e0083a94303e2d6988b352f3b33082a79a726b30ff746709b0fe869a1a6"
+nextcloud_source_sha256="f3db0ec5e0aaff7c088eb34f752d77d79913bc6784e0fc47a84cdaa28e567a33"