diff --git a/pynode/package-lock.json b/pynode/package-lock.json
index 61dbb2b..d042760 100644
--- a/pynode/package-lock.json
+++ b/pynode/package-lock.json
@@ -1329,9 +1329,9 @@
       "integrity": "sha1-1HLbIo6zMcJQaw6MFVJK25OdEsE="
     },
     "semver": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
-      "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg=="
+      "version": "5.7.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.2.tgz",
+      "integrity": "sha512-cBznnQ9KjJqU67B52RMC65CMarK2600WFnbkcaiwWq3xy/5haFJlshgnpjovMVJ+Hff49d8GEn0b87C5pDQ10g=="
     },
     "send": {
       "version": "0.16.2",
@@ -1556,7 +1556,8 @@
     "sylvester": {
       "version": "0.0.21",
       "resolved": "https://registry.npmjs.org/sylvester/-/sylvester-0.0.21.tgz",
-      "integrity": "sha1-KYexzivS84sNzio0OIiEv6RADqc="
+      "integrity": "sha1-KYexzivS84sNzio0OIiEv6RADqc=",
+      "optional": true
     },
     "to-array": {
       "version": "0.1.4",