diff --git a/README.md b/README.md
index 8e2ef25..69774fa 100644
--- a/README.md
+++ b/README.md
@@ -67,18 +67,21 @@ Fast, simple, async php telegram api server:
         `http://127.0.0.1:9503/api/getInfo/?id=@xtrime` or `http://127.0.0.1:9503/api/getInfo/?abcd=@xtrime` works the same
     * CombinedAPI (multiple sessions) support. 
 
-        If running with multiple sessions use include 'session' in path, before method, to define which session to use for request:
-        * `php server.php --session=session --session=bot --session=xtrime`
-        * `http://127.0.0.1:9503/api/xtrime/getSelf` 
+        When running  multiple sessions, need to define which session to use for request.
+        Each session is stored in `sessions/{$session}.madeline`. Nested folders supported.
+        
+        Examples:
+        * `php server.php --session=bot --session=users/xtrime --session=users/user1`
         * `http://127.0.0.1:9503/api/bot/getSelf`
-        * `http://127.0.0.1:9503/api/session/getSelf`
+        * `http://127.0.0.1:9503/api/users/xtrime/getSelf` 
+        * `http://127.0.0.1:9503/api/users/user1/getSelf`
+        * sessions file paths are: `sessions/bot.madeline`, `sessions/users/xtrime.madeline` and `sessions/users/user1.madeline`
         
-        Each session is store in `{$session}.madeline` file in root folder of library.
     * EventHandler updates via websocket. Connect to `ws://127.0.0.1:9503/events`. You will get all events in json.
-        Each event stored inside object, where key is name of session which created event. 
+        Each event is json object. Key is name of session, which created event. 
         
-        When using CombinedAPI (multiple account) name of session can be added to path of websocket endpoint: 
-        `ws://127.0.0.1:9503/events/session_name`. This endpoint will send events only from given session.
+        When using CombinedAPI (multiple accounts) name of session can be added to path of websocket endpoint: 
+        This endpoint will send events only from `users/xtrime` session: `ws://127.0.0.1:9503/events/users/xtrime`
         
         PHP websocket client example: [websocket-events.php](https://github.com/xtrime-ru/TelegramApiServer/blob/master/examples/websocket-events.php)
     
diff --git a/server.php b/server.php
index b49dd19..ed5fa51 100644
--- a/server.php
+++ b/server.php
@@ -28,16 +28,18 @@ $options = [
 if ($options['help']) {
     $help = 'Fast, simple, async php telegram parser: MadelineProto + Swoole Server
 
-usage: php server.php [--help] [-a=|--address=127.0.0.1] [-p=|--port=9503] [-s=|--session=]
+usage: php server.php [--help] [-a=|--address=127.0.0.1] [-p=|--port=9503] [-s=|--session=session]
 
 Options:
         --help      Show this message
     -a  --address   Server ip (optional) (example: 127.0.0.1)
     -p  --port      Server port (optional) (example: 9503)
-    -s  --session   Prefix for session file (optional) (example: xtrime). 
-                    Multiple sessions can be used via CombinedAPI. Example "--session=user --session=bot"
-                    If running multiple sessions, then "session" parameter must be provided with every request.
-                    See README for example requests.
+    -s  --session   Name for session file (optional) (example: xtrime). 
+                    Multiple sessions can be used (MadelineProto CombinedAPI). 
+                    Example: "--session=user --session=bot"
+                    Each session is stored in `sessions/{$session}.madeline`. 
+                    Nested folders supported.
+                    See README for more examples.
     
 
 Also all options can be set in .env file (see .env.example)
diff --git a/src/Client.php b/src/Client.php
index d483a69..903445e 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -43,6 +43,7 @@ class Client
         if (!$session) {
             return null;
         }
+        $session = rtrim(trim($session), '/');
         $session = static::$sessionFolder . '/' . $session . static::$sessionExtension;
         $session = str_replace('//', '/', $session);
         return $session;
@@ -129,11 +130,11 @@ class Client
         }
 
         if (!$session) {
-            throw new \InvalidArgumentException('Multiple sessions detected. You need to specify which session to use');
+            throw new \InvalidArgumentException('Multiple sessions detected. Specify which session to use. See README for examples.');
         }
 
         if (empty($this->MadelineProtoCombined->instances[$session])) {
-            throw new \InvalidArgumentException('Session not found');
+            throw new \InvalidArgumentException('Session not found.');
         }
 
         return $this->MadelineProtoCombined->instances[$session];
diff --git a/src/Server/Router.php b/src/Server/Router.php
index 6727eb2..6801a6d 100644
--- a/src/Server/Router.php
+++ b/src/Server/Router.php
@@ -41,11 +41,11 @@ class Router
 
         foreach (['GET', 'POST'] as $method) {
             $this->router->addRoute($method, '/api/{method}[/]', $apiHandler);
-            $this->router->addRoute($method, '/api/{session:.*?}/{method}[/]', $apiHandler);
+            $this->router->addRoute($method, '/api/{session:.*?[^/]}/{method}[/]', $apiHandler);
         }
 
         $this->router->addRoute('GET', '/events[/]', $eventsHandler);
-        $this->router->addRoute('GET', '/events/{session:.*?}[/]', $eventsHandler);
+        $this->router->addRoute('GET', '/events/{session:.*?[^/]}[/]', $eventsHandler);
     }