diff --git a/src/parser.yy b/src/parser.yy
index 1d73510..c1132d5 100644
--- a/src/parser.yy
+++ b/src/parser.yy
@@ -30,10 +30,10 @@
 %skeleton "lalr1.cc"
 
 /* namespace to enclose parser in */
-%name-prefix="example"
+%define api.namespace {example}
 
 /* set the parser's class identifier */
-%define "parser_class_name" "Parser"
+%define parser_class_name {Parser}
 
 /* keep track of the current position within the input */
 %locations