diff --git a/package.json b/package.json
index 5cd874c..d27be0b 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "author": "",
   "license": "All rights reserved",
   "dependencies": {
-    "async": "^2.0.1",
+    "async": "^3.2.2",
     "chalk": "^1.1.1",
     "pg": "^8.7.1"
   },
diff --git a/yarn.lock b/yarn.lock
index ca28f35..e9797ff 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14,11 +14,10 @@ assertion-error@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.0.tgz#c7f85438fdd466bc7ca16ab90c81513797a5d23b"
 
-async@^2.0.1:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.1.tgz#b245a23ca71930044ec53fa46aa00a3e87c6a610"
-  dependencies:
-    lodash "^4.17.10"
+async@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.2.2.tgz#2eb7671034bb2194d45d30e31e24ec7e7f9670cd"
+  integrity sha512-H0E+qZaDEfx/FY4t7iLRv1W2fFI6+pyCeTw1uN20AQPiwqwM6ojPxHxdLv4z8hi2DtnW9BOckSspLucW7pIE5g==
 
 buffer-writer@2.0.0:
   version "2.0.0"
@@ -34,7 +33,7 @@ chai@^1.9.2:
 
 chalk@^1.1.1:
   version "1.1.3"
-  resolved "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
+  resolved "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
   dependencies:
     ansi-styles "^2.2.1"
     escape-string-regexp "^1.0.2"
@@ -44,15 +43,15 @@ chalk@^1.1.1:
 
 commander@0.6.1:
   version "0.6.1"
-  resolved "http://registry.npmjs.org/commander/-/commander-0.6.1.tgz#fa68a14f6a945d54dbbe50d8cdb3320e9e3b1a06"
+  resolved "https://registry.npmjs.org/commander/-/commander-0.6.1.tgz#fa68a14f6a945d54dbbe50d8cdb3320e9e3b1a06"
 
 commander@2.3.0:
   version "2.3.0"
-  resolved "http://registry.npmjs.org/commander/-/commander-2.3.0.tgz#fd430e889832ec353b9acd1de217c11cb3eef873"
+  resolved "https://registry.npmjs.org/commander/-/commander-2.3.0.tgz#fd430e889832ec353b9acd1de217c11cb3eef873"
 
 debug@2.2.0:
   version "2.2.0"
-  resolved "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
+  resolved "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
   dependencies:
     ms "0.7.1"
 
@@ -106,10 +105,6 @@ jade@0.26.3:
     commander "0.6.1"
     mkdirp "0.3.0"
 
-lodash@^4.17.10:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
-
 lru-cache@2:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
@@ -123,15 +118,15 @@ minimatch@0.3:
 
 minimist@0.0.8:
   version "0.0.8"
-  resolved "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+  resolved "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
 mkdirp@0.3.0:
   version "0.3.0"
-  resolved "http://registry.npmjs.org/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"
+  resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"
 
 mkdirp@0.5.1:
   version "0.5.1"
-  resolved "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
     minimist "0.0.8"
 
@@ -143,7 +138,7 @@ mocha-concise-reporter@1.x:
 
 mocha@^2.0.0:
   version "2.5.3"
-  resolved "http://registry.npmjs.org/mocha/-/mocha-2.5.3.tgz#161be5bdeb496771eb9b35745050b622b5aefc58"
+  resolved "https://registry.npmjs.org/mocha/-/mocha-2.5.3.tgz#161be5bdeb496771eb9b35745050b622b5aefc58"
   dependencies:
     commander "2.3.0"
     debug "2.2.0"
@@ -261,7 +256,7 @@ supports-color@^2.0.0:
 
 through@2:
   version "2.3.8"
-  resolved "http://registry.npmjs.org/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
+  resolved "https://registry.npmjs.org/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
 to-iso-string@0.0.2:
   version "0.0.2"