diff --git a/package-lock.json b/package-lock.json
index 08e0a30f..1e9fa009 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -393,8 +393,7 @@
         "esprima": "^4.0.1",
         "estraverse": "^5.2.0",
         "esutils": "^2.0.2",
-        "optionator": "^0.8.1",
-        "source-map": "~0.6.1"
+        "optionator": "^0.8.1"
       },
       "bin": {
         "escodegen": "bin/escodegen.js",