diff --git a/nav-app/package-lock.json b/nav-app/package-lock.json
old mode 100755
new mode 100644
index fce6ac3bd..3c71cb639
--- a/nav-app/package-lock.json
+++ b/nav-app/package-lock.json
@@ -510,6 +510,7 @@
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       "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
       "dev": true,
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@@ -782,6 +783,14 @@
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+      },
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+          "integrity": "sha1-isw4NFgk8W2DZbfJtCWRaOjtYD4=",
+          "dev": true
+        }
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@@ -1680,7 +1689,8 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
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@@ -1784,9 +1794,9 @@
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-      "integrity": "sha1-isw4NFgk8W2DZbfJtCWRaOjtYD4="
+      "version": "2.6.11",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+      "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg=="
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       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
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@@ -3227,7 +3238,8 @@
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@@ -3278,7 +3290,8 @@
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@@ -3293,6 +3306,7 @@
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@@ -3301,6 +3315,7 @@
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@@ -3309,6 +3324,7 @@
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@@ -3317,7 +3333,8 @@
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@@ -3334,12 +3351,14 @@
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@@ -3347,22 +3366,26 @@
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           "version": "1.1.0",
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           "bundled": true,
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@@ -3402,7 +3425,8 @@
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@@ -3434,7 +3458,8 @@
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@@ -3456,12 +3481,14 @@
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           "bundled": true,
           "dev": true,
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@@ -3517,6 +3544,7 @@
           "version": "7.1.2",
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           "dev": true,
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@@ -3529,7 +3557,8 @@
         "graceful-fs": {
           "version": "4.1.11",
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@@ -3557,6 +3586,7 @@
           "version": "3.1.3",
           "bundled": true,
           "dev": true,
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           "requires": {
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@@ -3567,7 +3597,8 @@
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           "version": "2.16.3",
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-          "dev": true
+          "dev": true,
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@@ -3584,6 +3615,7 @@
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           "bundled": true,
           "dev": true,
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@@ -3592,7 +3624,8 @@
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-          "dev": true
+          "dev": true,
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@@ -3604,6 +3637,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
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           "requires": {
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@@ -3617,7 +3651,8 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3690,12 +3725,14 @@
         "mime-db": {
           "version": "1.27.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.27.0"
           }
@@ -3704,6 +3741,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3711,12 +3749,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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           }
@@ -3771,7 +3811,8 @@
         "number-is-nan": {
           "version": "1.0.1",
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-          "dev": true
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+          "optional": true
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@@ -3789,6 +3830,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3818,7 +3860,8 @@
         "path-is-absolute": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3829,7 +3872,8 @@
         "process-nextick-args": {
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           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.4.1",
@@ -3867,6 +3911,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3911,6 +3956,7 @@
           "version": "2.6.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "glob": "7.1.2"
           }
@@ -3918,7 +3964,8 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "semver": {
           "version": "5.3.0",
@@ -3942,6 +3989,7 @@
           "version": "1.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -3975,6 +4023,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3985,6 +4034,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -3999,6 +4049,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -4013,6 +4064,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -4068,7 +4120,8 @@
         "util-deprecate": {
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-          "dev": true
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@@ -4097,7 +4150,8 @@
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           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4106,6 +4160,7 @@
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
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       "requires": {
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@@ -4124,6 +4179,7 @@
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       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
       "dev": true,
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@@ -4440,7 +4496,8 @@
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       "integrity": "sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=",
-      "dev": true
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+      "optional": true
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     "has-value": {
       "version": "1.0.0",
@@ -5611,6 +5668,12 @@
         "useragent": "2.3.0"
       },
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+          "version": "2.5.3",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.3.tgz",
+          "integrity": "sha1-isw4NFgk8W2DZbfJtCWRaOjtYD4=",
+          "dev": true
+        },
         "lodash": {
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           "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
@@ -6422,7 +6485,8 @@
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           "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6436,6 +6500,7 @@
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           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -6497,7 +6562,8 @@
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           "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
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@@ -6559,6 +6625,7 @@
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       "dev": true,
+      "optional": true,
       "requires": {
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@@ -11100,6 +11167,7 @@
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       "dev": true,
+      "optional": true,
       "requires": {
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       }
diff --git a/nav-app/package.json b/nav-app/package.json
old mode 100755
new mode 100644
index b48442fbb..5fd5dd7d7
--- a/nav-app/package.json
+++ b/nav-app/package.json
@@ -27,7 +27,7 @@
     "angular-2-dropdown-multiselect": "^1.6.3",
     "angular2-multiselect-dropdown": "^2.2.1",
     "classlist.js": "^1.1.20150312",
-    "core-js": "^2.4.1",
+    "core-js": "^2.6.11",
     "file-saver": "^1.3.3",
     "load-json-file": "^4.0.0",
     "mathjs": "^3.17.0",