diff --git a/package-lock.json b/package-lock.json
index 50ae7dc..6a8caa6 100644
--- a/package-lock.json
+++ b/package-lock.json
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       "resolved": "https://registry.npmjs.org/tryor/-/tryor-0.1.2.tgz",
       "integrity": "sha1-gUXkynyv9ArN48z5Rui4u3W0Fys="
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-    "tunnel-agent": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
-      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
-      "requires": {
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-      }
-    },
-    "tweetnacl": {
-      "version": "0.14.5",
-      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
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       "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
@@ -5844,14 +5088,6 @@
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     },
-    "uri-js": {
-      "version": "4.2.2",
-      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
-      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
-      "requires": {
-        "punycode": "^2.1.0"
-      }
-    },
     "urix": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
@@ -5872,11 +5108,6 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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-    "uuid": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
-      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
-    },
     "v8flags": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.3.tgz",
@@ -5899,16 +5130,6 @@
       "resolved": "https://registry.npmjs.org/value-or-function/-/value-or-function-3.0.0.tgz",
       "integrity": "sha1-HCQ6ULWVwb5Up1S/7OhWO5/42BM="
     },
-    "verror": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
-      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
-      "requires": {
-        "assert-plus": "^1.0.0",
-        "core-util-is": "1.0.2",
-        "extsprintf": "^1.2.0"
-      }
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       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.2.0.tgz",
@@ -5991,14 +5212,6 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz",
       "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8="
     },
-    "wide-align": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
-      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
-      "requires": {
-        "string-width": "^1.0.2 || 2"
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-    },
     "window-size": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.2.0.tgz",
@@ -6046,11 +5259,6 @@
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
       "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ=="
     },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
-    },
     "yargs": {
       "version": "6.4.0",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.4.0.tgz",
diff --git a/package.json b/package.json
index 87a67f0..36a9621 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "gulp-jshint": "^2.1.0",
     "gulp-ng-annotate": "^2.1.0",
     "gulp-rename": "^1.4.0",
-    "gulp-sass": "^4.0.1",
+    "gulp-sass": "^5.1.0",
     "gulp-sourcemaps": "^2.6.4",
     "gulp-uglify": "^3.0.1",
     "jshint": "^2.9.6",