diff --git a/package-lock.json b/package-lock.json
index d230e9d..dbcced0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,6 +35,7 @@
       "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",
@@ -88,9 +89,19 @@
       "dev": true
     },
     "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "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=="
+        }
+      }
     },
     "asynckit": {
       "version": "0.4.0",
@@ -776,6 +787,12 @@
         "uglify-js": "^2.6"
       },
       "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        },
         "source-map": {
           "version": "0.4.4",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
@@ -959,6 +976,12 @@
         "wordwrap": "^1.0.0"
       },
       "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        },
         "supports-color": {
           "version": "3.2.3",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.2.3.tgz",
@@ -1044,6 +1067,7 @@
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.1.0.tgz",
       "integrity": "sha1-R11pil5J/15T0U4+cyQp3Iv0z0c=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-buffer": "^1.0.2"
       }
@@ -1148,7 +1172,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "md5": {
       "version": "2.2.1",
@@ -1700,7 +1725,8 @@
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "request": {
       "version": "2.79.0",
@@ -1953,6 +1979,14 @@
             "async": "^1.5.2",
             "combined-stream": "^1.0.5",
             "mime-types": "^2.1.10"
+          },
+          "dependencies": {
+            "async": {
+              "version": "1.5.2",
+              "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+              "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+              "dev": true
+            }
           }
         }
       }
diff --git a/package.json b/package.json
index 9a0b354..a4bc7b4 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Front end shop.",
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^2.6.4",
     "body-parser": "^1.15.1",
     "cookie-parser": "^1.4.3",
     "epimetheus": "^1.0.46",