diff --git a/package-lock.json b/package-lock.json
index 7c37a95..63be8ec 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,9 +5,9 @@
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   "dependencies": {
     "async": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.1.0.tgz",
-      "integrity": "sha512-4vx/aaY6j/j3Lw3fbCHNWP0pPaTCew3F6F3hYyl/tHs/ndmV1q7NW9T5yuJ2XAGwdQrP+6Wu20x06U4APo/iQQ=="
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.2.tgz",
+      "integrity": "sha512-H0E+qZaDEfx/FY4t7iLRv1W2fFI6+pyCeTw1uN20AQPiwqwM6ojPxHxdLv4z8hi2DtnW9BOckSspLucW7pIE5g=="
     },
     "babel": {
       "version": "6.23.0",
diff --git a/package.json b/package.json
index afca514..1cd96fd 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/jakubowiczish/theory-of-concurrency#readme",
   "dependencies": {
-    "async": "^3.1.0",
+    "async": "^3.2.2",
     "babel": "^6.23.0"
   },
   "devDependencies": {},