diff --git a/package-lock.json b/package-lock.json
index 6934ce6..dc14e4a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1334,6 +1334,16 @@
         "@babel/plugin-syntax-json-strings": "^7.2.0"
       }
     },
+    "@babel/plugin-proposal-nullish-coalescing-operator": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.4.4.tgz",
+      "integrity": "sha512-Amph7Epui1Dh/xxUxS2+K22/MUi6+6JVTvy3P58tja3B6yKTSjwwx0/d83rF7551D6PVSSoplQb8GCwqec7HRw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-nullish-coalescing-operator": "^7.2.0"
+      }
+    },
     "@babel/plugin-proposal-numeric-separator": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-numeric-separator/-/plugin-proposal-numeric-separator-7.2.0.tgz",
@@ -1364,6 +1374,16 @@
         "@babel/plugin-syntax-optional-catch-binding": "^7.2.0"
       }
     },
+    "@babel/plugin-proposal-optional-chaining": {
+      "version": "7.6.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.6.0.tgz",
+      "integrity": "sha512-kj4gkZ6qUggkprRq3Uh5KP8XnE1MdIO0J7MhdDX8+rAbB6dJ2UrensGIS+0NPZAaaJ1Vr0PN6oLUgXMU1uMcSg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-optional-chaining": "^7.2.0"
+      }
+    },
     "@babel/plugin-proposal-throw-expressions": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-throw-expressions/-/plugin-proposal-throw-expressions-7.2.0.tgz",
@@ -1466,6 +1486,15 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
+    "@babel/plugin-syntax-nullish-coalescing-operator": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-nullish-coalescing-operator/-/plugin-syntax-nullish-coalescing-operator-7.2.0.tgz",
+      "integrity": "sha512-lRCEaKE+LTxDQtgbYajI04ddt6WW0WJq57xqkAZ+s11h4YgfRHhVA/Y2VhfPzzFD4qeLHWg32DMp9HooY4Kqlg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0"
+      }
+    },
     "@babel/plugin-syntax-numeric-separator": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-numeric-separator/-/plugin-syntax-numeric-separator-7.2.0.tgz",
@@ -1493,6 +1522,15 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
+    "@babel/plugin-syntax-optional-chaining": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-optional-chaining/-/plugin-syntax-optional-chaining-7.2.0.tgz",
+      "integrity": "sha512-HtGCtvp5Uq/jH/WNUPkK6b7rufnCPLLlDAFN7cmACoIjaOOiXxUt3SswU5loHqrhtqTsa/WoLQ1OQ1AGuZqaWA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0"
+      }
+    },
     "@babel/plugin-syntax-throw-expressions": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-throw-expressions/-/plugin-syntax-throw-expressions-7.2.0.tgz",
@@ -5644,13 +5682,15 @@
       }
     },
     "babel-preset-airbnb": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/babel-preset-airbnb/-/babel-preset-airbnb-4.1.0.tgz",
-      "integrity": "sha512-j11sDtH9kGl7KvfTABRqc3cI9AzXqA4D5R+DMmFQtbO8f59iEfIw6wJr2Z0AbHDfEFctJ/sJWtpb8ll7sU5azw==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/babel-preset-airbnb/-/babel-preset-airbnb-4.2.0.tgz",
+      "integrity": "sha512-LVrCjj5hEpc7WFiQ+L2TX5TwLMhxSyFS4fknx0Iq/+DMAOdXVKlZ3DNNlPIMBF7OyPGp4d+r6I+YQRPzprqinA==",
       "dev": true,
       "requires": {
         "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-proposal-nullish-coalescing-operator": "^7.4.4",
         "@babel/plugin-proposal-object-rest-spread": "^7.4.4",
+        "@babel/plugin-proposal-optional-chaining": "^7.6.0",
         "@babel/plugin-transform-classes": "^7.4.4",
         "@babel/plugin-transform-exponentiation-operator": "^7.2.0",
         "@babel/plugin-transform-jscript": "^7.2.0",
diff --git a/package.json b/package.json
index 301f071..c4e62b0 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "babel-eslint": "10.0.3",
     "babel-jest": "24.9.0",
     "babel-loader": "8.0.6",
-    "babel-preset-airbnb": "4.1.0",
+    "babel-preset-airbnb": "4.2.0",
     "clean-webpack-plugin": "3.0.0",
     "copy-webpack-plugin": "5.0.5",
     "css-loader": "3.2.0",