diff --git a/src/parser/parser.yy b/src/parser/parser.yy
index 3d482ad..779f6c8 100644
--- a/src/parser/parser.yy
+++ b/src/parser/parser.yy
@@ -29,9 +29,9 @@ refptr<Scope> parser_scope;
 
 %}
 
-%pure-parser
+%define api.pure
 %locations
-%error-verbose
+%define parse.error verbose
 
 %token PLUS;
 %token MINUS;