diff --git a/package-lock.json b/package-lock.json
index 62985db..84a7a84 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -79,6 +79,7 @@
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             "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
             "dev": true,
+            "optional": true,
             "requires": {
                 "kind-of": "3.2.2",
                 "longest": "1.0.1",
@@ -1971,39 +1972,49 @@
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         "grunt-shell": {
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-            "resolved": "https://registry.npmjs.org/grunt-shell/-/grunt-shell-2.1.0.tgz",
-            "integrity": "sha1-Q595FZ7RHmSmUaacyKPQK+v17MI=",
+            "version": "3.0.0",
+            "resolved": "https://registry.npmjs.org/grunt-shell/-/grunt-shell-3.0.0.tgz",
+            "integrity": "sha512-H4ots7FD/UEYGjNbRLmvuQZ6LPwOeAj8Y9Ow8FQIo6IoCAmACx0CFYISOlmkJm/KmUvfMFAla976iqDf1yCRYw==",
             "dev": true,
             "requires": {
-                "chalk": "1.1.3",
-                "npm-run-path": "2.0.2"
+                "chalk": "^2.4.1",
+                "npm-run-path": "^2.0.0"
             },
             "dependencies": {
                 "ansi-styles": {
-                    "version": "2.2.1",
-                    "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-                    "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-                    "dev": true
+                    "version": "3.2.1",
+                    "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+                    "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+                    "dev": true,
+                    "requires": {
+                        "color-convert": "^1.9.0"
+                    }
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                 "chalk": {
-                    "version": "1.1.3",
-                    "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-                    "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+                    "version": "2.4.1",
+                    "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.1.tgz",
+                    "integrity": "sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==",
                     "dev": true,
                     "requires": {
-                        "ansi-styles": "2.2.1",
-                        "escape-string-regexp": "1.0.5",
-                        "has-ansi": "2.0.0",
-                        "strip-ansi": "3.0.1",
-                        "supports-color": "2.0.0"
+                        "ansi-styles": "^3.2.1",
+                        "escape-string-regexp": "^1.0.5",
+                        "supports-color": "^5.3.0"
                     }
                 },
-                "supports-color": {
-                    "version": "2.0.0",
-                    "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-                    "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+                "has-flag": {
+                    "version": "3.0.0",
+                    "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+                    "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
                     "dev": true
+                },
+                "supports-color": {
+                    "version": "5.5.0",
+                    "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+                    "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+                    "dev": true,
+                    "requires": {
+                        "has-flag": "^3.0.0"
+                    }
                 }
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@@ -3590,7 +3601,8 @@
             "version": "1.0.1",
             "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
             "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "loose-envify": {
             "version": "1.3.1",
@@ -3831,7 +3843,7 @@
             "integrity": "sha1-NakjLfo11wZ7TLLd8jV7GHFTbF8=",
             "dev": true,
             "requires": {
-                "path-key": "2.0.1"
+                "path-key": "^2.0.0"
             }
         },
         "number-is-nan": {
diff --git a/package.json b/package.json
index 3493982..2730424 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
         "grunt": "^1.0.1",
         "grunt-contrib-watch": "^1.0.0",
         "grunt-eslint": "^20.0.0",
-        "grunt-shell": "^2.1.0",
+        "grunt-shell": "^3.0.0",
         "husky": "^0.14.1",
         "jest-cli": "^20.0.4",
         "load-grunt-tasks": "^3.5.2"