diff --git a/src/web/client/onetofifty.html b/src/web/client/onetofifty.html
index 7ff391d..bfc5ebe 100644
--- a/src/web/client/onetofifty.html
+++ b/src/web/client/onetofifty.html
@@ -43,7 +43,7 @@
 
 		<!-- library source files -->
 		<script src="../../game/lib/util/number_util.js"></script>
-		<script src="../../game/lib/util/record_util.js"></script>
+		<script src="../../game/lib/util/record_util.js?update_date=190511"></script>
 
 		<script src="../../game/lib/text/input_type_text.js"></script>
 		<script src="../../game/lib/text/mission_clear_text.js"></script>