diff --git a/package.json b/package.json
index 53af8e9..9a492a4 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "timsort": "^0.3.0"
   },
   "devDependencies": {
-    "async": "^2.5.0",
+    "async": "^3.2.2",
     "babel-core": "^6.26.3",
     "babel-loader": "^7.1.1",
     "babel-plugin-transform-es3-member-expression-literals": "^6.22.0",
diff --git a/yarn.lock b/yarn.lock
index 4a8163a..951c896 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -349,13 +349,18 @@ async-each@^1.0.1:
   resolved "https://registry.yarnpkg.com/async-each/-/async-each-1.0.2.tgz#8b8a7ca2a658f927e9f307d6d1a42f4199f0f735"
   integrity sha512-6xrbvN0MOBKSJDdonmSSz2OwFSgxRaVtBDes26mj9KIGtDo+g9xosFRSC+i1gQh2oAN/tQ62AI/pGZGQjVOiRg==
 
-async@^2.1.2, async@^2.5.0:
+async@^2.1.2:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/async/-/async-2.6.1.tgz#b245a23ca71930044ec53fa46aa00a3e87c6a610"
   integrity sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==
   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==
+
 asynckit@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"