diff --git a/package-lock.json b/package-lock.json
index ba9c80d..51325cb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -420,9 +420,9 @@
 			"dev": true
 		},
 		"async": {
-			"version": "2.6.3",
-			"resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
-			"integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
+			"version": "2.6.4",
+			"resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+			"integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
 			"dev": true,
 			"requires": {
 				"lodash": "^4.17.14"
@@ -3097,7 +3097,8 @@
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
 			"integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
-			"dev": true
+			"dev": true,
+			"optional": true
 		},
 		"npmlog": {
 			"version": "4.1.2",