diff --git a/src/index.ts b/src/index.ts
index f95c8ed..021c6aa 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,7 @@
 import { Parser } from './parser';
 
 export * from './builder';
+export * from './constants';
 export * from './lexer';
 export * from './types';
 export * from './visitor';