diff --git a/package-lock.json b/package-lock.json
index 0512bed..28cd569 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -204,15 +204,14 @@
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     },
     "nearley": {
-      "version": "2.19.7",
-      "resolved": "https://registry.npmjs.org/nearley/-/nearley-2.19.7.tgz",
-      "integrity": "sha512-Y+KNwhBPcSJKeyQCFjn8B/MIe+DDlhaaDgjVldhy5xtFewIbiQgcbZV8k2gCVwkI1ZsKCnjIYZbR+0Fim5QYgg==",
+      "version": "2.20.1",
+      "resolved": "https://registry.npmjs.org/nearley/-/nearley-2.20.1.tgz",
+      "integrity": "sha512-+Mc8UaAebFzgV+KpI5n7DasuuQCHA89dmwm7JXw3TV43ukfNQ9DnBH3Mdb2g/I4Fdxc26pwimBWvjIw0UAILSQ==",
       "requires": {
         "commander": "^2.19.0",
         "moo": "^0.5.0",
         "railroad-diagrams": "^1.0.0",
-        "randexp": "0.4.6",
-        "semver": "^5.4.1"
+        "randexp": "0.4.6"
       }
     },
     "once": {
@@ -247,11 +246,6 @@
       "resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
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     },
-    "semver": {
-      "version": "5.7.1",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
-      "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
-    },
     "supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",