diff --git a/conf/homeserver.yaml b/conf/homeserver.yaml
index 83afbad..0084bf7 100644
--- a/conf/homeserver.yaml
+++ b/conf/homeserver.yaml
@@ -1017,8 +1017,8 @@ report_stats: __REPORT_STATS__
 # A list of application service config files to use
 #
 #app_service_config_files:
-#  - app_service_1.yaml
-#  - app_service_2.yaml
+#
+## Managed by a specific config file in /etc/matrix-synapse/conf.d/app_service.yaml
 
 # Uncomment to enable tracking of application service IP addresses. Implicitly
 # enables MAU tracking for application service users.
diff --git a/scripts/install b/scripts/install
index 8a6949b..db835d9 100644
--- a/scripts/install
+++ b/scripts/install
@@ -381,14 +381,16 @@ ynh_script_progression --message="Configuring log rotation..." --weight=2
 ynh_use_logrotate --logfile "/var/log/matrix-$app"
 
 #=================================================
-# ADD SCRIPT FOR COTURN CRON
+# ADD SCRIPT FOR COTURN CRON AND APP SERVICE
 #=================================================
 
 # WARNING : theses command are used in INSTALL, UPGRADE
 # For any update do it in all files
 
 cp ../sources/Coturn_config_rotate.sh $final_path/
+cp ../sources/update_synapse_for_appservice.sh $final_path/
 ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/Coturn_config_rotate.sh"
+ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/update_synapse_for_appservice.sh"
 
 #=================================================
 # GENERIC FINALIZATION
@@ -419,6 +421,7 @@ ynh_replace_string __DOMAIN__ $domain ../hooks/post_cert_update
 # For any update do it in all files
 chown $synapse_user:root -R $final_path
 chmod 770 $final_path/Coturn_config_rotate.sh
+chmod 700 $final_path/update_synapse_for_appservice.sh
 chown $synapse_user:root -R /var/lib/matrix-$app
 chown $synapse_user:root -R /var/log/matrix-$app
 chown $synapse_user:root -R /etc/matrix-$app
diff --git a/scripts/restore b/scripts/restore
index 3d01fba..c0d4616 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -230,6 +230,7 @@ ynh_use_logrotate --logfile /var/log/matrix-$app
 # For any update do it in all files
 chown $synapse_user:root -R $final_path
 chmod 770 $final_path/Coturn_config_rotate.sh
+chmod 700 $final_path/update_synapse_for_appservice.sh
 chown $synapse_user:root -R /var/lib/matrix-$app
 chown $synapse_user:root -R /var/log/matrix-$app
 chown $synapse_user:root -R /etc/matrix-$app
diff --git a/scripts/upgrade b/scripts/upgrade
index dc96e06..27c86b8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -415,14 +415,16 @@ fi
 ynh_store_file_checksum --file="$coturn_config_path"
 
 #=================================================
-# ADD SCRIPT FOR COTURN CRON
+# ADD SCRIPT FOR COTURN CRON AND APP SERVICE
 #=================================================
 
 # WARNING : theses command are used in INSTALL, UPGRADE
 # For any update do it in all files
 
 cp ../sources/Coturn_config_rotate.sh $final_path/
+cp ../sources/update_synapse_for_appservice.sh $final_path/
 ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/Coturn_config_rotate.sh"
+ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/update_synapse_for_appservice.sh"
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
@@ -473,6 +475,7 @@ ynh_permission_url --permission main --url $domain/_matrix/cas_server.php/login
 # For any update do it in all files
 chown $synapse_user:root -R $final_path
 chmod 770 $final_path/Coturn_config_rotate.sh
+chmod 700 $final_path/update_synapse_for_appservice.sh
 chown $synapse_user:root -R /var/lib/matrix-$app
 chown $synapse_user:root -R /var/log/matrix-$app
 chown $synapse_user:root -R /etc/matrix-$app
diff --git a/sources/update_synapse_for_appservice.sh b/sources/update_synapse_for_appservice.sh
new file mode 100644
index 0000000..17bbca3
--- /dev/null
+++ b/sources/update_synapse_for_appservice.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+app=__APP__
+service_config_file=/etc/matrix-$app/conf.d/app_service.yaml
+
+# Backup the previous config file
+cp $service_config_file /tmp/app_service_backup.yaml
+
+echo "app_service_config_files:" > $service_config_file
+for f in $(ls /etc/matrix-$app/app-service/); do
+    echo "  - /etc/matrix-synapse/$app" >> $service_config_file
+done
+
+# Set permissions
+chown matrix-$app $service_config_file
+chmod 600 $service_config_file
+
+systemctl restart matrix-$app
+
+if [ $? -eq 0 ]; then
+    rm /tmp/app_service_backup.yaml
+    exit 0
+else
+    echo "Failed to restart synapse with the new config file. Restore the old config file !!"
+    cp /tmp/app_service_backup.yaml $service_config_file
+fi