diff --git a/def/def_parser.yy b/def/def_parser.yy
index d695f15..9b7767f 100644
--- a/def/def_parser.yy
+++ b/def/def_parser.yy
@@ -2,7 +2,7 @@
 %language "c++"
 %glr-parser
 %token-table
-%define "parser_class_name" {DEFParser}
+%define api.parser.class {DEFParser}
 
 %code requires {
 	namespace def {
diff --git a/lef/lef_parser.yy b/lef/lef_parser.yy
index 42da791..76ef5a1 100644
--- a/lef/lef_parser.yy
+++ b/lef/lef_parser.yy
@@ -1,10 +1,10 @@
 %define api.prefix {lef}
-%error-verbose
+%define parse.error verbose
 %language "c++"
 %glr-parser
 %debug
 %token-table
-%define "parser_class_name" {LEFParser}
+%define api.parser.class {LEFParser}
 
 %code requires {
 	namespace lef {
diff --git a/magic/magic_parser.yy b/magic/magic_parser.yy
index 55cb97a..be56da7 100644
--- a/magic/magic_parser.yy
+++ b/magic/magic_parser.yy
@@ -1,10 +1,10 @@
 %define api.prefix {magic}
-%error-verbose
+%define parse.error verbose
 %language "c++"
 %glr-parser
 %debug
 %token-table
-%define "parser_class_name" {MagicParser}
+%define api.parser.class {MagicParser}
 
 %code requires {
 	namespace magic {
diff --git a/schematics_reader/schematics_parser.yy b/schematics_reader/schematics_parser.yy
index 1cc3a64..7cca2af 100644
--- a/schematics_reader/schematics_parser.yy
+++ b/schematics_reader/schematics_parser.yy
@@ -1,5 +1,5 @@
-%error-verbose
-%define "parser_class_name" {SchematicsParser}
+%define parse.error verbose
+%define api.parser.class {SchematicsParser}
 %define api.prefix {schematics}
 %language "c++"
 
diff --git a/symbol_reader/symbol_parser.yy b/symbol_reader/symbol_parser.yy
index 05b1ceb..47e8943 100644
--- a/symbol_reader/symbol_parser.yy
+++ b/symbol_reader/symbol_parser.yy
@@ -1,10 +1,10 @@
 %define api.prefix {symbol}
-%error-verbose
+%define parse.error verbose
 %language "c++"
 %glr-parser
 %debug
 %token-table
-%define "parser_class_name" {SymbolParser}
+%define api.parser.class {SymbolParser}
 
 %code requires {
 	namespace symbol {
diff --git a/tech_reader/tech_parser.yy b/tech_reader/tech_parser.yy
index 8a85916..e79bb89 100644
--- a/tech_reader/tech_parser.yy
+++ b/tech_reader/tech_parser.yy
@@ -1,10 +1,10 @@
 %define api.prefix {tech}
-%error-verbose
+%define parse.error verbose
 %language "c++"
 %glr-parser
 %debug
 %token-table
-%define "parser_class_name" {TechParser}
+%define api.parser.class {TechParser}
 
 %code requires {
 	namespace tech {