diff --git a/package-lock.json b/package-lock.json
index 6c0d0abc0..3a918d872 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -276,9 +276,9 @@
       "dev": true
     },
     "eventemitter3": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-3.0.1.tgz",
-      "integrity": "sha512-QOCPu979MMWX9XNlfRZoin+Wm+bK1SP7vv3NGUniYwuSJK/+cPA10blMaeRgzg31RvoSFk6FsCDVa4vNryBTGA=="
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.0.tgz",
+      "integrity": "sha512-qerSRB0p+UDEssxTtm6EDKcE7W4OaoisfIMl4CngyEhjpYglocpNg6UEqCvemdGhosAsg4sO2dXJOdyBifPGCg=="
     },
     "expect.js": {
       "version": "0.3.1",
@@ -598,6 +598,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "3.2.2",
             "longest": "1.0.1",
@@ -1754,7 +1755,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
diff --git a/package.json b/package.json
index 7dac58ca3..fa6bc0388 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   ],
   "main": "index.js",
   "dependencies": {
-    "eventemitter3": "^3.0.0",
+    "eventemitter3": "^4.0.0",
     "requires-port": "^1.0.0",
     "follow-redirects": "^1.0.0"
   },