diff --git a/package-lock.json b/package-lock.json
index cb1e1ae..e4f2684 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1179,6 +1179,7 @@
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       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "3.2.2",
         "longest": "1.0.1",
@@ -1483,6 +1484,12 @@
         "trim-right": "1.0.1"
       },
       "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        },
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           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
@@ -1521,6 +1528,14 @@
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         "babylon": "6.18.0",
         "lodash": "4.17.4"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
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     "babel-traverse": {
@@ -1538,6 +1553,14 @@
         "globals": "9.18.0",
         "invariant": "2.2.4",
         "lodash": "4.17.4"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
       }
     },
     "babel-types": {
@@ -1550,6 +1573,14 @@
         "esutils": "2.0.2",
         "lodash": "4.17.4",
         "to-fast-properties": "1.0.3"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
       }
     },
     "babylon": {
@@ -2825,6 +2856,14 @@
       "dev": true,
       "requires": {
         "lodash": "4.17.4"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
       }
     },
     "combined-stream": {
@@ -3025,6 +3064,12 @@
             "ansi-regex": "0.2.1"
           }
         },
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        },
         "strip-ansi": {
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           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-0.3.0.tgz",
@@ -4774,6 +4819,7 @@
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
+      "optional": true,
       "requires": {
         "graceful-fs": "4.1.11",
         "inherits": "2.0.3",
@@ -5272,6 +5318,12 @@
             "json5": "0.5.1",
             "object-assign": "4.1.1"
           }
+        },
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
         }
       }
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@@ -6699,13 +6751,15 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.19",
           "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.19.tgz",
           "integrity": "sha512-P1tKYHVSZ6uFo26mtnve4HQFE3koh1UWVkp8YUC+ESBHe945xWSoXuHHiGarDqcEZ+whpCDnlNw5LON0kLo+sw==",
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.35.0"
           }
@@ -6829,6 +6883,12 @@
         "minimist": "1.2.0"
       },
       "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        },
         "minimist": {
           "version": "1.2.0",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
@@ -7005,9 +7065,9 @@
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     "lodash": {
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-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
-      "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
     },
     "lodash.assign": {
@@ -7162,7 +7222,8 @@
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       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
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@@ -7763,13 +7824,15 @@
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           "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.35.0.tgz",
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-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.19",
           "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.19.tgz",
           "integrity": "sha512-P1tKYHVSZ6uFo26mtnve4HQFE3koh1UWVkp8YUC+ESBHe945xWSoXuHHiGarDqcEZ+whpCDnlNw5LON0kLo+sw==",
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.35.0"
           }
@@ -9289,7 +9352,15 @@
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
           "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
-          "dev": true
+          "dev": true,
+          "optional": true
+        },
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true,
+          "optional": true
         },
         "yargs": {
           "version": "7.1.0",
@@ -10283,6 +10354,14 @@
       "dev": true,
       "requires": {
         "lodash": "4.17.4"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.4",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+          "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+          "dev": true
+        }
       }
     },
     "statuses": {
diff --git a/package.json b/package.json
index 99fcb21..52a6dc0 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "karma-jasmine": "^1.0.2",
     "karma-jasmine-html-reporter": "^0.2.2",
     "lite-server": "^2.2.2",
-    "lodash": "^4.16.4",
+    "lodash": "^4.17.21",
     "protractor": "~4.0.14",
     "rimraf": "^2.5.4",
     "tslint": "^3.15.1",