diff --git a/grammar/Lua51.jj b/grammar/Lua51.jj
index 9f09de3a..cd7a7ae1 100644
--- a/grammar/Lua51.jj
+++ b/grammar/Lua51.jj
@@ -15,7 +15,7 @@
 
 options {
   STATIC = false;
-  JDK_VERSION = "1.3";
+  JDK_VERSION = "1.8";
   ERROR_REPORTING = false;
   DEBUG_LOOKAHEAD = false;
   DEBUG_PARSER = false;
diff --git a/grammar/Lua52.jj b/grammar/Lua52.jj
index d84f4c6f..b304677a 100644
--- a/grammar/Lua52.jj
+++ b/grammar/Lua52.jj
@@ -15,7 +15,7 @@
 
 options {
   STATIC = false;
-  JDK_VERSION = "1.3";
+  JDK_VERSION = "1.8";
   ERROR_REPORTING = false;
   DEBUG_LOOKAHEAD = false;
   DEBUG_PARSER = false;
diff --git a/grammar/LuaParser.jj b/grammar/LuaParser.jj
index 11c30b8b..374dc0b9 100644
--- a/grammar/LuaParser.jj
+++ b/grammar/LuaParser.jj
@@ -26,7 +26,7 @@
 
 options {
   STATIC = false;
-  JDK_VERSION = "1.3";
+  JDK_VERSION = "1.8";
   ERROR_REPORTING = true;
   UNICODE_INPUT = true;
   DEBUG_LOOKAHEAD = false;