diff --git a/package-lock.json b/package-lock.json
index bdf5f7c..cb93f99 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,9 +10,9 @@
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     },
     "acorn": {
-      "version": "5.7.3",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw=="
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg=="
     },
     "ajv": {
       "version": "6.10.2",
@@ -1420,6 +1420,7 @@
               "version": "1.0.5",
               "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz",
               "integrity": "sha1-k4NwpXtKUd6ix3wV1cX9+JUWQAk=",
+              "optional": true,
               "requires": {
                 "delayed-stream": "~1.0.0"
               },
@@ -1427,7 +1428,8 @@
                 "delayed-stream": {
                   "version": "1.0.0",
                   "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-                  "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+                  "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
+                  "optional": true
                 }
               }
             },
@@ -1631,6 +1633,7 @@
                   "version": "2.9.0",
                   "resolved": "https://registry.npmjs.org/boom/-/boom-2.9.0.tgz",
                   "integrity": "sha1-pUt/0v7kd9NRv543FoDL6mfxJxU=",
+                  "optional": true,
                   "requires": {
                     "hoek": "2.x.x"
                   }
@@ -1647,7 +1650,8 @@
                 "hoek": {
                   "version": "2.16.3",
                   "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
-                  "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0="
+                  "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
+                  "optional": true
                 },
                 "sntp": {
                   "version": "1.0.9",
@@ -1701,6 +1705,7 @@
               "version": "2.1.7",
               "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.7.tgz",
               "integrity": "sha1-/2A5cOPHMe9vf03zyaD0Y6E8J1U=",
+              "optional": true,
               "requires": {
                 "mime-db": "~1.19.0"
               },
@@ -1708,7 +1713,8 @@
                 "mime-db": {
                   "version": "1.19.0",
                   "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.19.0.tgz",
-                  "integrity": "sha1-SWoYGYp86CRFNOJbsQK3T7Qg/VY="
+                  "integrity": "sha1-SWoYGYp86CRFNOJbsQK3T7Qg/VY=",
+                  "optional": true
                 }
               }
             },