diff --git a/package.json b/package.json
index 6749fce..2cfaef7 100644
--- a/package.json
+++ b/package.json
@@ -57,5 +57,6 @@
   "dependencies": {
     "antlr4-c3": "^3.0.1",
     "antlr4ts": "^0.5.0-alpha.4"
-  }
+  },
+  "sideEffects": false
 }