diff --git a/package-lock.json b/package-lock.json
index aa9939d..d5c7565 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
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@@ -2075,6 +2058,15 @@
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-      "integrity": "sha1-a6MY6xaWFyf10oT46gA+jWFU0Mg=",
-      "dev": true,
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-7.1.2.tgz",
+      "integrity": "sha512-ZEjj/dQYQy0Zx0lgLMLR8QuaqTihnxirir7EwUHp1Axq4e3+k8jXU5K0VLbNvedv1f4EWtBonDIZm0NUr+jCcA==",
       "requires": {
         "camelcase": "^3.0.0",
         "cliui": "^3.2.0",
@@ -12509,37 +12376,34 @@
         "string-width": "^1.0.2",
         "which-module": "^1.0.0",
         "y18n": "^3.2.1",
-        "yargs-parser": "^5.0.0"
+        "yargs-parser": "^5.0.1"
       },
       "dependencies": {
         "camelcase": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
-          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
-          "dev": true
+          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
         },
         "y18n": {
           "version": "3.2.2",
           "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
-          "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==",
-          "dev": true
+          "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ=="
         }
       }
     },
     "yargs-parser": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-5.0.0.tgz",
-      "integrity": "sha1-J17PDX/+Bcd+ZOfIbkzZS/DhIoo=",
-      "dev": true,
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-5.0.1.tgz",
+      "integrity": "sha512-wpav5XYiddjXxirPoCTUPbqM0PXvJ9hiBMvuJgInvo4/lAOTZzUprArw17q2O1P2+GHhbBr18/iQwjL5Z9BqfA==",
       "requires": {
-        "camelcase": "^3.0.0"
+        "camelcase": "^3.0.0",
+        "object.assign": "^4.1.0"
       },
       "dependencies": {
         "camelcase": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
-          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
-          "dev": true
+          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
         }
       }
     },
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 9a00e86..8959779
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "@angular/router": "^6.1.10",
     "core-js": "^2.5.4",
     "fullpage.js": "^3.1.1",
-    "node-sass": "^6.0.0",
+    "node-sass": "^4.13.1",
     "rxjs": "~6.2.0",
     "zone.js": "~0.8.26"
   },