diff --git a/package-lock.json b/package-lock.json
index 5b0f839e99..11ba480645 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4374,13 +4374,13 @@
       "dev": true
     },
     "grunt-sass": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/grunt-sass/-/grunt-sass-1.2.1.tgz",
-      "integrity": "sha1-+4e2yqxG+zLUUXf9Lktv90aMGRk=",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/grunt-sass/-/grunt-sass-2.1.0.tgz",
+      "integrity": "sha512-XkexnQt/9rhReNd+Y7T0n/2g5FqYOQKfi2iSlpwDqvgs7EgEaGTxNhnWzHnbW5oNRvzL9AHopBG3AgRxL0d+DA==",
       "dev": true,
       "requires": {
         "each-async": "^1.0.0",
-        "node-sass": "^3.7.0",
+        "node-sass": "^4.7.2",
         "object-assign": "^4.0.1"
       }
     },
@@ -5518,6 +5518,12 @@
       "integrity": "sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8=",
       "dev": true
     },
+    "lodash.mergewith": {
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/lodash.mergewith/-/lodash.mergewith-4.6.1.tgz",
+      "integrity": "sha512-eWw5r+PYICtEBgrBE5hhlT6aAa75f411bgDz/ZL2KZqYV03USvucsxcHUIlGTDTECs1eunpI7HOV7U+WLDvNdQ==",
+      "dev": true
+    },
     "logalot": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/logalot/-/logalot-2.1.0.tgz",
@@ -5907,9 +5913,9 @@
       }
     },
     "node-sass": {
-      "version": "3.13.1",
-      "resolved": "https://registry.npmjs.org/node-sass/-/node-sass-3.13.1.tgz",
-      "integrity": "sha1-ckD7v/I5YwS0IjUn7TAgWJwAT8I=",
+      "version": "4.11.0",
+      "resolved": "https://registry.npmjs.org/node-sass/-/node-sass-4.11.0.tgz",
+      "integrity": "sha512-bHUdHTphgQJZaF1LASx0kAviPH7sGlcyNhWade4eVIpFp6tsn7SV8xNMTbsQFpEV9VXpnwTTnNYlfsZXgGgmkA==",
       "dev": true,
       "requires": {
         "async-foreach": "^0.1.3",
@@ -5921,13 +5927,16 @@
         "in-publish": "^2.0.0",
         "lodash.assign": "^4.2.0",
         "lodash.clonedeep": "^4.3.2",
+        "lodash.mergewith": "^4.6.0",
         "meow": "^3.7.0",
         "mkdirp": "^0.5.1",
-        "nan": "^2.3.2",
-        "node-gyp": "^3.3.1",
+        "nan": "^2.10.0",
+        "node-gyp": "^3.8.0",
         "npmlog": "^4.0.0",
-        "request": "^2.61.0",
-        "sass-graph": "^2.1.1"
+        "request": "^2.88.0",
+        "sass-graph": "^2.2.4",
+        "stdout-stream": "^1.4.0",
+        "true-case-path": "^1.0.2"
       },
       "dependencies": {
         "cross-spawn": {
@@ -7636,6 +7645,15 @@
       "integrity": "sha1-+vUbnrdKrvOzrPStX2Gr8ky3uT4=",
       "dev": true
     },
+    "stdout-stream": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/stdout-stream/-/stdout-stream-1.4.1.tgz",
+      "integrity": "sha512-j4emi03KXqJWcIeF8eIXkjMFN1Cmb8gUlDYGeBALLPo5qdyTfA9bOtl8m33lRoC+vFMkP3gl0WsDr6+gzxbbTA==",
+      "dev": true,
+      "requires": {
+        "readable-stream": "^2.0.1"
+      }
+    },
     "stream-buffers": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/stream-buffers/-/stream-buffers-2.2.0.tgz",
@@ -8038,6 +8056,31 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
       "dev": true
     },
+    "true-case-path": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/true-case-path/-/true-case-path-1.0.3.tgz",
+      "integrity": "sha512-m6s2OdQe5wgpFMC+pAJ+q9djG82O2jcHPOI6RNg1yy9rCYR+WD6Nbpl32fDpfC56nirdRy+opFa/Vk7HYhqaew==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.2"
+      },
+      "dependencies": {
+        "glob": {
+          "version": "7.1.3",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
+          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        }
+      }
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
diff --git a/package.json b/package.json
index d29d64375f..739b17b69b 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "grunt-po2json": "^0.3.0",
     "grunt-remove-logging": "ehynds/grunt-remove-logging",
     "grunt-rename": "^0.1.4",
-    "grunt-sass": "^1.2.0",
+    "grunt-sass": "^2.1.0",
     "grunt-shell": "^1.1.2",
     "grunt-text-replace": "^0.4.0",
     "lodash": "^4.17.5"