diff --git a/package-lock.json b/package-lock.json
index 25fb8ed..865b515 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,11 +5,18 @@
   "requires": true,
   "dependencies": {
     "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
       "requires": {
-        "lodash": "^4.14.0"
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+        }
       }
     },
     "balanced-match": {
diff --git a/package.json b/package.json
index d2139ec..00b1eba 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/Tinder/sharded-redis-client",
   "dependencies": {
-    "async": "2.6.0",
+    "async": "2.6.4",
     "circuit-breaker": "git+ssh://git@github.com/Tinder/circuit-breaker",
     "lodash": "4.17.4",
     "redis": "2.8.0"