diff --git a/web/package-lock.json b/web/package-lock.json
index 33f5730..475372c 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -67,9 +67,12 @@
       "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
     },
     "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"
+      }
     },
     "babel-runtime": {
       "version": "6.26.0",
diff --git a/web/package.json b/web/package.json
index 1112e14..6453ec5 100644
--- a/web/package.json
+++ b/web/package.json
@@ -14,7 +14,7 @@
     "start": "node ./bin/www"
   },
   "dependencies": {
-    "async": "^1.4.0",
+    "async": "^2.6.4",
     "body-parser": "^1.18.3",
     "connect-ensure-login": "^0.1.1",
     "connect-flash": "^0.1.1",