diff --git a/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php b/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php
index b478d039..a1f72d8a 100644
--- a/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php
+++ b/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php
@@ -26,7 +26,7 @@ public function __construct(\SessionHandlerInterface $handler) {
     /**
      * {@inheritdoc}
      */
-    public function getId() {
+    public function getId(): string {
         return $this->_sessionId;
     }
 
@@ -40,7 +40,7 @@ public function setId($id) {
     /**
      * {@inheritdoc}
      */
-    public function getName() {
+    public function getName(): string {
         return $this->_sessionName;
     }
 
diff --git a/src/Ratchet/Session/Storage/VirtualSessionStorage.php b/src/Ratchet/Session/Storage/VirtualSessionStorage.php
index daa10bba..a18c5dea 100644
--- a/src/Ratchet/Session/Storage/VirtualSessionStorage.php
+++ b/src/Ratchet/Session/Storage/VirtualSessionStorage.php
@@ -25,7 +25,7 @@ public function __construct(\SessionHandlerInterface $handler, $sessionId, Handl
     /**
      * {@inheritdoc}
      */
-    public function start() {
+    public function start(): bool {
         if ($this->started && !$this->closed) {
             return true;
         }
@@ -51,7 +51,7 @@ public function start() {
     /**
      * {@inheritdoc}
      */
-    public function regenerate($destroy = false, $lifetime = null) {
+    public function regenerate($destroy = false, $lifetime = null): bool {
         // .. ?
     }