diff --git a/src/Producer/KafkaProducerBuilder.php b/src/Producer/KafkaProducerBuilder.php
index ffada2a..487488f 100644
--- a/src/Producer/KafkaProducerBuilder.php
+++ b/src/Producer/KafkaProducerBuilder.php
@@ -157,8 +157,8 @@ public function build(): KafkaProducerInterface
         }
 
         //Thread termination improvement (https://github.com/arnaud-lb/php-rdkafka#performance--low-latency-settings)
-        $this->config['socket.timeout.ms'] = '50';
-        $this->config['queue.buffering.max.ms'] = '1';
+        $this->config['socket.timeout.ms'] = $this->config['socket.timeout.ms'] ?? '50';
+        $this->config['queue.buffering.max.ms'] = $this->config['queue.buffering.max.ms'] ?? '1';
 
         if (function_exists('pcntl_sigprocmask')) {
             pcntl_sigprocmask(SIG_BLOCK, array(SIGIO));