diff --git a/lib/scout_apm/layer_converters/request_queue_time_converter.rb b/lib/scout_apm/layer_converters/request_queue_time_converter.rb
index aa0fe00d..507cea0d 100644
--- a/lib/scout_apm/layer_converters/request_queue_time_converter.rb
+++ b/lib/scout_apm/layer_converters/request_queue_time_converter.rb
@@ -4,7 +4,7 @@ class RequestQueueTimeConverter < ConverterBase
 
       HEADERS = %w(X-Queue-Start X-Request-Start X-QUEUE-START X-REQUEST-START x-queue-start x-request-start)
 
-      WEBSOCKET_HEADERS = %w(Sec-WebSocket-Protocol Sec-WebSocket-Version Sec-WebSocket-Key)
+      WEBSOCKET_HEADERS = %w(SEC_WEBSOCKET_VERSION Sec-WebSocket-Version SEC_WEBSOCKET_PROTOCOL Sec-WebSocket-Protocol SEC_WEBSOCKET_KEY Sec-WebSocket-Key)
 
       def headers
         request.headers