--- parser.ypp.orig	2017-10-16 21:39:41 UTC
+++ parser.ypp
@@ -7,12 +7,12 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-%require "3"
+%require "3.0"
 
 %skeleton "lalr1.cc"
 
 %defines
-%define parser_class_name {GraphQLParserImpl}
+%define api.parser.class {GraphQLParserImpl}
 
 %define api.token.prefix {TOK_}