diff --git a/src/Stream.php b/src/Stream.php
index 507f135..e472366 100644
--- a/src/Stream.php
+++ b/src/Stream.php
@@ -66,6 +66,16 @@ public function __toString()
         }
     }
 
+    /**
+     * Close the socket when the object is destructed.
+     */
+    public function __destruct()
+    {
+        if (is_resource($this->socket)) {
+            $this->close();
+        }
+    }
+
     /**
      * {@inheritdoc}
      */