diff --git a/units/collections/package-lock.json b/units/collections/package-lock.json
index b34faa5..4df961c 100644
--- a/units/collections/package-lock.json
+++ b/units/collections/package-lock.json
@@ -5,11 +5,18 @@
 	"requires": true,
 	"dependencies": {
 		"async": {
-			"version": "2.6.1",
-			"resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-			"integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
+			"version": "2.6.4",
+			"resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+			"integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
 			"requires": {
-				"lodash": "^4.17.10"
+				"lodash": "^4.17.14"
+			},
+			"dependencies": {
+				"lodash": {
+					"version": "4.17.21",
+					"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+					"integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+				}
 			}
 		},
 		"lodash": {
diff --git a/units/collections/package.json b/units/collections/package.json
index 31fd5ce..f7c2a05 100644
--- a/units/collections/package.json
+++ b/units/collections/package.json
@@ -20,7 +20,7 @@
     "test": "echo \"Error: run tests from root\" && exit 1"
   },
   "dependencies": {
-    "async": "^2.6.1",
+    "async": "^2.6.4",
     "lodash": "^4.17.11"
   }
 }