diff --git a/usr/lib/python3.8/vmmgr/vmmgr.py b/usr/lib/python3.8/vmmgr/vmmgr.py
index 7bd15af..6719779 100644
--- a/usr/lib/python3.8/vmmgr/vmmgr.py
+++ b/usr/lib/python3.8/vmmgr/vmmgr.py
@@ -23,6 +23,7 @@ def register_app(app, host, login, password):
         'visible': False,
     })
     register_proxy(app)
+    update_app_config(app)
 
 def unregister_app(app):
     unregister_proxy(app)
@@ -54,6 +55,7 @@ def update_host(domain, port):
         f.write(templates.NGINX_DEFAULT.format(port=port, domain=domain))
     for app in config.get_apps().keys():
         register_proxy(app)
+    update_app_config()
 
 def reload_nginx():
     subprocess.run(['/usr/sbin/nginx', '-s', 'reload'])
@@ -76,6 +78,7 @@ def update_common_settings(email, gmaps_api_key):
     # Update common configuration values
     config.set_common('email', email)
     config.set_common('gmaps-api-key', gmaps_api_key)
+    update_app_config()
 
 def update_password(oldpassword, newpassword):
     # Update LUKS password and adminpwd for WSGI application
@@ -156,6 +159,29 @@ def update_app_autostart(app_name, enabled):
     # Add/remove the app to OpenRC default runlevel
     App(app_name, False).set_autostart(enabled)
 
+def update_app_config(app_name=None):
+    # Set environment variables and run scripts to update relevant application configuration files
+    common = config.get_common()
+    host = config.get_host()
+    apps = config.get_apps()
+    env = os.environ.copy()
+    env['LAYERS_DIR'] = spoc_config.LAYERS_DIR
+    env['VOLUMES_DIR'] = spoc_config.VOLUMES_DIR
+    env['APPS_DIR'] = spoc_config.APPS_DIR
+    env['LOG_DIR'] = spoc_config.LOG_DIR
+    env['DOMAIN'] = host['domain']
+    env['PORT'] = host['port']
+    env['EMAIL'] = common['email']
+    env['GMAPS_API_KEY'] = common['gmaps-api-key']
+    app_names = [app_name] if app_name else repo_local.get_apps()
+    for app_name in app_names:
+        install_dir = os.path.join(spoc_config.APPS_DIR, app_name, 'install')
+        script_path = os.path.join(install_dir, 'update-conf.sh')
+        if os.path.exists(script_path):
+            app_env = env.copy()
+            app_env['HOST'] = apps[app_name]['host']
+            subprocess.run(script_path, cwd=install_dir, env=app_env)
+
 def is_app_started(app_name):
     # Assume that the main container has always the same name as the app
     return Container(app_name).get_state() == ContainerState.RUNNING