diff --git a/package.json b/package.json
index ad96e6f..39a33ca 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "md5": "2.3.0",
     "numeral": "2.0.6",
     "paralleljs": "1.1.0",
-    "peggy": "^2.0.1",
+    "peggy": "^4.0.0",
     "pegjs": "0.10.0",
     "sql.js": "1.9.0",
     "ts-pegjs": "^2.1.0",