diff --git a/package-lock.json b/package-lock.json
index 7bd1162..33e6396 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -252,6 +252,25 @@
         "readable-stream": "^2.0.0",
         "tar-stream": "^1.5.0",
         "zip-stream": "^1.2.0"
+      },
+      "dependencies": {
+        "async": {
+          "version": "2.6.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
+          "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
+          "dev": true,
+          "requires": {
+            "lodash": "^4.17.11"
+          },
+          "dependencies": {
+            "lodash": {
+              "version": "4.17.11",
+              "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+              "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+              "dev": true
+            }
+          }
+        }
       }
     },
     "archiver-utils": {
@@ -365,19 +384,9 @@
       "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c="
     },
     "async": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha1-skWiPKcZMAROxT+kaqAKPofGphA=",
-      "requires": {
-        "lodash": "^4.17.10"
-      },
-      "dependencies": {
-        "lodash": {
-          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha1-G3eTz3JZ6jj7NmHU04syYK+K5Oc="
-        }
-      }
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.0.1.tgz",
+      "integrity": "sha512-ZswD8vwPtmBZzbn9xyi8XBQWXH3AvOQ43Za1KWYq7JeycrZuUYzx01KvHcVbXltjqH4y0MWrQ33008uLTqXuDw=="
     },
     "asynckit": {
       "version": "0.4.0",
@@ -3284,7 +3293,7 @@
         },
         "strip-ansi": {
           "version": "3.0.1",
-          "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "requires": {
             "ansi-regex": "^2.0.0"
@@ -4413,23 +4422,6 @@
         }
       }
     },
-    "node-pre-gyp": {
-      "version": "0.10.2",
-      "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.10.2.tgz",
-      "integrity": "sha512-16lql9QTqs6KsB9fl3neWyZm02KxIKdI9FlJjrB0y7eMTP5Nyz+xalwPbOlw3iw7EejllJPmlJSnY711PLD1ug==",
-      "requires": {
-        "detect-libc": "^1.0.2",
-        "mkdirp": "^0.5.1",
-        "needle": "^2.2.0",
-        "nopt": "^4.0.1",
-        "npm-packlist": "^1.1.6",
-        "npmlog": "^4.0.2",
-        "rc": "^1.2.7",
-        "rimraf": "^2.6.1",
-        "semver": "^5.3.0",
-        "tar": "^4"
-      }
-    },
     "nopt": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.1.tgz",
@@ -4542,6 +4534,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -4866,7 +4859,8 @@
         "is-buffer": {
           "version": "1.1.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "is-builtin-module": {
           "version": "1.0.0",
@@ -4950,6 +4944,7 @@
           "version": "3.2.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "is-buffer": "^1.1.5"
           }
@@ -4996,7 +4991,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",
@@ -5262,7 +5258,8 @@
         "repeat-string": {
           "version": "1.6.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "require-directory": {
           "version": "2.1.1",
@@ -6485,6 +6482,23 @@
             "uri-js": "^4.2.2"
           }
         },
+        "async": {
+          "version": "2.6.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
+          "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
+          "dev": true,
+          "requires": {
+            "lodash": "^4.17.11"
+          },
+          "dependencies": {
+            "lodash": {
+              "version": "4.17.11",
+              "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+              "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+              "dev": true
+            }
+          }
+        },
         "aws4": {
           "version": "1.8.0",
           "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
@@ -6907,6 +6921,25 @@
         "nan": "~2.10.0",
         "node-pre-gyp": "^0.10.3",
         "request": "^2.87.0"
+      },
+      "dependencies": {
+        "node-pre-gyp": {
+          "version": "0.10.3",
+          "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.10.3.tgz",
+          "integrity": "sha512-d1xFs+C/IPS8Id0qPTZ4bUT8wWryfR/OzzAFxweG+uLN85oPzyo2Iw6bVlLQ/JOdgNonXLCoRyqDzDWq4iw72A==",
+          "requires": {
+            "detect-libc": "^1.0.2",
+            "mkdirp": "^0.5.1",
+            "needle": "^2.2.1",
+            "nopt": "^4.0.1",
+            "npm-packlist": "^1.1.6",
+            "npmlog": "^4.0.2",
+            "rc": "^1.2.7",
+            "rimraf": "^2.6.1",
+            "semver": "^5.3.0",
+            "tar": "^4"
+          }
+        }
       }
     },
     "sshpk": {
diff --git a/package.json b/package.json
index 438f2b5..29cab40 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "node": ">=8.0"
   },
   "dependencies": {
-    "async": "^2.0.1",
+    "async": "^3.0.1",
     "bcrypt": "^3.0.2",
     "body-parser": "^1.17.1",
     "cookie-parser": "^1.4.3",