diff --git a/package-lock.json b/package-lock.json
index 0836a13..8879cba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6401,6 +6401,25 @@
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       "dev": true
     },
+    "portfinder": {
+      "version": "1.0.17",
+      "resolved": "https://registry.npmjs.org/portfinder/-/portfinder-1.0.17.tgz",
+      "integrity": "sha512-syFcRIRzVI1BoEFOCaAiizwDolh1S1YXSodsVhncbhjzjZQulhczNRbqnUl9N31Q4dKGOXsNDqxC2BWBgSMqeQ==",
+      "dev": true,
+      "requires": {
+        "async": "1.5.2",
+        "debug": "2.6.9",
+        "mkdirp": "0.5.1"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
+      }
+    },
     "posix-character-classes": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/posix-character-classes/-/posix-character-classes-0.1.1.tgz",
diff --git a/package.json b/package.json
index 97bb7d9..44bb138 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,8 @@
     "jest": "^23.5.0",
     "jsdoc": "^3.5.5",
     "node-emoji": "^1.8.1",
-    "nsp": "^2.1.0"
+    "nsp": "^2.1.0",
+    "portfinder": "^1.0.17"
   },
   "repository": {
     "type": "",