diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 70bc69bc1..bf2fa8047 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -3733,6 +3733,18 @@
         }
       }
     },
+    "opn": {
+      "version": "3.0.2",
+      "from": "opn@*",
+      "resolved": "https://registry.npmjs.org/opn/-/opn-3.0.2.tgz",
+      "dependencies": {
+        "object-assign": {
+          "version": "3.0.0",
+          "from": "object-assign@>=3.0.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-3.0.0.tgz"
+        }
+      }
+    },
     "optimist": {
       "version": "0.6.1",
       "from": "optimist@0.6.1",
diff --git a/package.json b/package.json
index abf8fd614..6ae28975d 100644
--- a/package.json
+++ b/package.json
@@ -63,6 +63,7 @@
     "jstransform": "^11.0.3",
     "module-deps": "^3.9.1",
     "node-fetch": "^1.3.3",
+    "opn": "^3.0.2",
     "optimist": "^0.6.1",
     "progress": "^1.1.8",
     "promise": "^7.0.4",