diff --git a/README.md b/README.md
index 18fb96e..a7bc84d 100644
--- a/README.md
+++ b/README.md
@@ -187,6 +187,7 @@ Below is the complete list of parameters that can be set using environment varia
 - **REDIS_SERVER_PORT**:  The Redis server port number.
 - **NGINX_WORKER_PROCESSES**: Defines the number of nginx worker processes.
 - **NGINX_WORKER_CONNECTIONS**: Sets the maximum number of simultaneous connections that can be opened by a nginx worker process.
+- **SECURE_LINK_SECRET**: Defines secret for the nginx config directive [secure_link_md5](http://nginx.org/ru/docs/http/ngx_http_secure_link_module.html#secure_link_md5). Defaults to `random string`.
 - **JWT_ENABLED**: Specifies the enabling the JSON Web Token validation by the ONLYOFFICE Document Server. Defaults to `false`.
 - **JWT_SECRET**: Defines the secret key to validate the JSON Web Token in the request to the ONLYOFFICE Document Server. Defaults to `secret`.
 - **JWT_HEADER**: Defines the http header that will be used to send the JSON Web Token. Defaults to `Authorization`.
diff --git a/run-document-server.sh b/run-document-server.sh
index c8dcf39..8011b54 100755
--- a/run-document-server.sh
+++ b/run-document-server.sh
@@ -468,6 +468,8 @@ update_nginx_settings(){
   if [ -f "${NGINX_ONLYOFFICE_EXAMPLE_CONF}" ]; then
     sed 's/linux/docker/' -i ${NGINX_ONLYOFFICE_EXAMPLE_CONF}
   fi
+
+  documentserver-update-securelink.sh -s ${SECURE_LINK_SECRET:-$(pwgen -s 20)}
 }
 
 update_supervisor_settings(){