diff --git a/lib/classes/Swift/Transport/StreamBuffer.php b/lib/classes/Swift/Transport/StreamBuffer.php
index 307d7c1fb..3fcafdeec 100644
--- a/lib/classes/Swift/Transport/StreamBuffer.php
+++ b/lib/classes/Swift/Transport/StreamBuffer.php
@@ -292,11 +292,11 @@ private function _establishSocketConnection()
         }
 
         if (!empty($this->_params['verifySsl'])) {
-            $options = array_merge_recursive($options, $this->_params['verifySsl']);
+            $options = array_replace_recursive($options, $this->_params['verifySsl']);
         }
 
         if (!empty($this->_params['stream_context_options'])) {
-            $options = array_merge_recursive($options, $this->_params['stream_context_options']);
+            $options = array_replace_recursive($options, $this->_params['stream_context_options']);
         }
 
         $streamContext = stream_context_create($options);