diff --git a/src/Connection/ConnectionLimitingPool.php b/src/Connection/ConnectionLimitingPool.php
index b51fd749..54af3472 100644
--- a/src/Connection/ConnectionLimitingPool.php
+++ b/src/Connection/ConnectionLimitingPool.php
@@ -82,6 +82,17 @@ public function __clone()
         $this->openConnectionCount = 0;
     }
 
+    public function __destruct()
+    {
+        foreach ($this->connections as $connectionFutures) {
+            foreach ($connectionFutures as $connectionFuture) {
+                $connectionFuture->map(static function (Connection $connection): void {
+                    $connection->close();
+                });
+            }
+        }
+    }
+
     public function getTotalConnectionAttempts(): int
     {
         return $this->totalConnectionAttempts;