diff --git a/package-lock.json b/package-lock.json
index 23ae396..bc76f8c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "name": "cron-control",
       "version": "2.0.0",
       "devDependencies": {
-        "grunt": "^1.6.2",
+        "grunt": "^1.6.3",
         "grunt-cli": "^1.5.0",
         "grunt-wp-i18n": "^1.0.4",
         "grunt-wp-readme-to-markdown": "^2.1.0"
@@ -518,9 +518,9 @@
       }
     },
     "node_modules/grunt": {
-      "version": "1.6.2",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.6.2.tgz",
-      "integrity": "sha512-bUzh5nA/P5L66ihXTDP6J5BGnMB/8lXJXejYWSbH4Y4TvWM9t2S39sggQDYYQlx06cYcCsmu63HMYHGCIzUVfg==",
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.6.3.tgz",
+      "integrity": "sha512-ng0CbpyNp/ox5e5CBY9TkZgVdAL4wK+nBHO6rNE8cXGa5kM++Lxlp0MpFBVZbpgOR2oCp/91V+T3CZVSWWLqMA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -534,7 +534,7 @@
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
         "iconv-lite": "~0.6.3",
-        "js-yaml": "~3.14.0",
+        "js-yaml": "^3.15.0",
         "minimatch": "^3.1.5",
         "nopt": "^5.0.0"
       },
@@ -896,9 +896,9 @@
       }
     },
     "node_modules/js-yaml": {
-      "version": "3.14.2",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
-      "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.15.0.tgz",
+      "integrity": "sha512-ttBQIIQPDeLjpPOohtUdXuXUVoA2uIB6fEH9HyJ7234s5mBJ5wTx20njxplLZQgLaOfpmPQA7X2t5AX6tIPbog==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index e5ad35f..8911691 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "grunt": "^1.6.2",
+    "grunt": "^1.6.3",
     "grunt-cli": "^1.5.0",
     "grunt-wp-i18n": "^1.0.4",
     "grunt-wp-readme-to-markdown": "^2.1.0"