diff --git a/package-lock.json b/package-lock.json
index 4327b69f..2e25ee1a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -149,12 +149,6 @@
       "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
       "dev": true
     },
-    "buffer-shims": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/buffer-shims/-/buffer-shims-1.0.0.tgz",
-      "integrity": "sha1-mXjOMXOIxkmth5MCjDR37wRKi1E=",
-      "dev": true
-    },
     "builtin-modules": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
@@ -652,6 +646,20 @@
       "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
       "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU="
     },
+    "greenkeeper-lockfile": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/greenkeeper-lockfile/-/greenkeeper-lockfile-1.3.2.tgz",
+      "integrity": "sha512-ZkUh91njuD6MHNo2A7g2tRtExGqexuCrpNEqzCKeyCrDNRdce3SyppGvpe7XO4fCRMEJRZZtPUYiVJPsckuBYA==",
+      "dev": true,
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
+      }
+    },
     "growl": {
       "version": "1.9.2",
       "resolved": "https://registry.npmjs.org/growl/-/growl-1.9.2.tgz",
@@ -1308,9 +1316,9 @@
       "dev": true
     },
     "readable-stream": {
-      "version": "2.2.9",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.2.9.tgz",
-      "integrity": "sha1-z3jsb0ptHrQ9JkiMrJfwQudLf8g=",
+      "version": "2.2.10",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.2.10.tgz",
+      "integrity": "sha512-HQEnnoV404e0EtwB9yNiuk2tJ+egeVC8Y9QBAxzDg8DBJt4BzRp+yQuIb/t3FIWkSTmIi+sgx7yVv/ZM0GNoqw==",
       "dev": true
     },
     "readline2": {
@@ -1357,6 +1365,12 @@
       "integrity": "sha1-UhTFOpJtNVJwdSf7q0FdvAjQbdo=",
       "dev": true
     },
+    "require-relative": {
+      "version": "0.8.7",
+      "resolved": "https://registry.npmjs.org/require-relative/-/require-relative-0.8.7.tgz",
+      "integrity": "sha1-eZlTn8ngR6N5KPoZb44VY9q9Nt4=",
+      "dev": true
+    },
     "require-uncached": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz",
@@ -1410,9 +1424,9 @@
       "integrity": "sha1-p9sUqxV/nXqsalbmVeejhg05vyY="
     },
     "safe-buffer": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.0.1.tgz",
-      "integrity": "sha1-0mPKVGls2KMGtcplUekt5XkY++c=",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.0.tgz",
+      "integrity": "sha512-aSLEDudu6OoRr/2rU609gRmnYboRLxgDG1z9o2Q0os7236FwvcqIOO8r8U5JUEwivZOhDaKlFO4SbPTJYyBEyQ==",
       "dev": true
     },
     "safefs": {
diff --git a/package.json b/package.json
index 24b4489b..b2c2b8bb 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
   "devDependencies": {
     "chai": "^4.0.0",
     "eslint-config-holy-grail": "^17.0.0",
+    "greenkeeper-lockfile": "^1.3.2",
     "grunt": "^1.0.1",
     "grunt-cli": "^1.2.0",
     "grunt-mocha-test": "^0.13.2",