diff --git a/src/Connection/Http1Connection.php b/src/Connection/Http1Connection.php
index b2d52352..acdea2c9 100644
--- a/src/Connection/Http1Connection.php
+++ b/src/Connection/Http1Connection.php
@@ -154,6 +154,8 @@ public function getStream(Request $request): Promise
 
     private function free(): Promise
     {
+        $this->socket = null;
+
         $this->lastUsedAt = 0;
 
         if ($this->timeoutWatcher !== null) {