diff --git a/package.json b/package.json
index c1d27cd..4f00b23 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "check-types": "^7.1.5",
     "commander": "^2.9.0",
     "escomplex": "2.0.0-alpha",
-    "esprima": "^3.1.3"
+    "esprima": "^4.0.0"
   },
   "devDependencies": {
     "chai": "^3.4.0",