diff --git a/package-lock.json b/package-lock.json
index 5811deb..f5d7a65 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1432,12 +1432,9 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
-      "requires": {
-        "lodash": "^4.14.0"
-      }
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.1.0.tgz",
+      "integrity": "sha512-4vx/aaY6j/j3Lw3fbCHNWP0pPaTCew3F6F3hYyl/tHs/ndmV1q7NW9T5yuJ2XAGwdQrP+6Wu20x06U4APo/iQQ=="
     },
     "async-limiter": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index 26165db..c18d123 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "homepage": "https://github.com/launchdarkly/node-server-sdk",
   "dependencies": {
     "@types/redis": "2.8.6",
-    "async": "2.6.0",
+    "async": "3.1.0",
     "lrucache": "^1.0.3",
     "node-cache": "^3.2.1",
     "node-sha1": "0.0.1",