diff --git a/package-lock.json b/package-lock.json
index 63fcc40..eb248d7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -674,9 +674,9 @@
             "dev": true
         },
         "acorn": {
-            "version": "5.7.1",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.1.tgz",
-            "integrity": "sha512-d+nbxBUGKg7Arpsvbnlq61mc12ek3EY8EQldM3GPAhWJ1UVxC6TDGbIvUMNU6obBX3i1+ptCIzV4vq0gFPEGVQ==",
+            "version": "5.7.4",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+            "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
             "dev": true
         },
         "agent-base": {
@@ -703,6 +703,7 @@
             "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
             "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
             "dev": true,
+            "optional": true,
             "requires": {
                 "kind-of": "^3.0.2",
                 "longest": "^1.0.1",
@@ -714,6 +715,7 @@
                     "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
                     "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "is-buffer": "^1.1.5"
                     }
@@ -1073,7 +1075,8 @@
             "version": "1.1.0",
             "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.0.tgz",
             "integrity": "sha512-c5mRlguI/Pe2dSZmpER62rSCu0ryKmWddzRYsuXc50U2/g8jMOulc31VZMa4mYx31U5xsmSOpDCgH88Vl9cDGQ==",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "builtin-modules": {
             "version": "1.1.1",
@@ -3988,7 +3991,8 @@
             "version": "1.0.1",
             "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
             "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "loose-envify": {
             "version": "1.4.0",
@@ -7560,6 +7564,7 @@
                     "version": "0.1.4",
                     "bundled": true,
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "kind-of": "^3.0.2",
                         "longest": "^1.0.1",
@@ -8502,7 +8507,8 @@
                 "longest": {
                     "version": "1.0.1",
                     "bundled": true,
-                    "dev": true
+                    "dev": true,
+                    "optional": true
                 },
                 "lru-cache": {
                     "version": "4.1.3",