diff --git a/src/Driver/Internal/AbstractHttpDriver.php b/src/Driver/Internal/AbstractHttpDriver.php
index 0a30777d..034a704c 100644
--- a/src/Driver/Internal/AbstractHttpDriver.php
+++ b/src/Driver/Internal/AbstractHttpDriver.php
@@ -17,7 +17,7 @@
 /** @internal */
 abstract class AbstractHttpDriver implements HttpDriver
 {
-    protected const HOST_HEADER_REGEX = /** @lang RegExp */ '#^([A-Z\d._\-]+|\[[\d:]+])(?::([1-9]\d*))?$#i';
+    protected const HOST_HEADER_REGEX = /** @lang RegExp */ '#^([A-Z\d._\-]+|\[[\dA-F:]+])(?::([1-9]\d*))?$#i';
 
     private static ?TimeoutQueue $timeoutQueue = null;