diff --git a/.babelrc b/.babelrc
index 77b47ce64f4..52fbb997490 100644
--- a/.babelrc
+++ b/.babelrc
@@ -10,6 +10,7 @@
   "plugins": [
     "transform-react-inline-elements",
     "transform-react-constant-elements",
+    "transform-class-properties",
     "syntax-dynamic-import"
   ]
 }
diff --git a/package-lock.json b/package-lock.json
index f1760cb6097..b6cd17f5730 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1057,6 +1057,12 @@
       "integrity": "sha1-ytnK0RkbWtY0vzCuCHI5HgZHvpU=",
       "dev": true
     },
+    "babel-plugin-syntax-class-properties": {
+      "version": "6.13.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz",
+      "integrity": "sha1-1+sjt5oxf4VDlixQW4J8fWysJ94=",
+      "dev": true
+    },
     "babel-plugin-syntax-dynamic-import": {
       "version": "6.18.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-syntax-dynamic-import/-/babel-plugin-syntax-dynamic-import-6.18.0.tgz",
@@ -1098,6 +1104,18 @@
         "babel-runtime": "6.26.0"
       }
     },
+    "babel-plugin-transform-class-properties": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-class-properties/-/babel-plugin-transform-class-properties-6.24.1.tgz",
+      "integrity": "sha1-anl2PqYdM9NvN7YRqp3vgagbRqw=",
+      "dev": true,
+      "requires": {
+        "babel-helper-function-name": "6.24.1",
+        "babel-plugin-syntax-class-properties": "6.13.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0"
+      }
+    },
     "babel-plugin-transform-es2015-arrow-functions": {
       "version": "6.22.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-es2015-arrow-functions/-/babel-plugin-transform-es2015-arrow-functions-6.22.0.tgz",
@@ -5499,61 +5517,6 @@
         }
       }
     },
-    "electron-download": {
-      "version": "github:brave/electron-download#409b65caff14edeef1daa36a7445ba6334658d7c",
-      "dev": true,
-      "requires": {
-        "debug": "2.6.9",
-        "home-path": "1.0.5",
-        "minimist": "1.2.0",
-        "mkdirp": "0.5.1",
-        "mv": "2.1.1",
-        "nugget": "1.6.2",
-        "path-exists": "1.0.0",
-        "rc": "1.2.1"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        },
-        "nugget": {
-          "version": "1.6.2",
-          "resolved": "https://registry.npmjs.org/nugget/-/nugget-1.6.2.tgz",
-          "integrity": "sha1-iMpuA7pXBqmRc/XaCQJZPWvK4Qc=",
-          "dev": true,
-          "requires": {
-            "debug": "2.6.9",
-            "minimist": "1.2.0",
-            "pretty-bytes": "1.0.4",
-            "progress-stream": "1.2.0",
-            "request": "2.82.0",
-            "single-line-log": "0.4.1",
-            "throttleit": "0.0.2"
-          }
-        },
-        "path-exists": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-1.0.0.tgz",
-          "integrity": "sha1-1aiZjrce83p0w06w2eum6HjuoIE=",
-          "dev": true
-        },
-        "single-line-log": {
-          "version": "0.4.1",
-          "resolved": "https://registry.npmjs.org/single-line-log/-/single-line-log-0.4.1.tgz",
-          "integrity": "sha1-h6VWSfdJ14PsDc2AToFA2Yc8fO4=",
-          "dev": true
-        },
-        "throttleit": {
-          "version": "0.0.2",
-          "resolved": "https://registry.npmjs.org/throttleit/-/throttleit-0.0.2.tgz",
-          "integrity": "sha1-z+34jmDADdlpe2H90qg0OptoDq8=",
-          "dev": true
-        }
-      }
-    },
     "electron-download-tf": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/electron-download-tf/-/electron-download-tf-4.3.1.tgz",
@@ -5739,6 +5702,20 @@
           "integrity": "sha1-HUixB9ghJqLz4hHC6iX4A7pVGyE=",
           "dev": true
         },
+        "electron-download": {
+          "version": "github:brave/electron-download#409b65caff14edeef1daa36a7445ba6334658d7c",
+          "dev": true,
+          "requires": {
+            "debug": "2.6.9",
+            "home-path": "1.0.5",
+            "minimist": "1.2.0",
+            "mkdirp": "0.5.1",
+            "mv": "2.1.1",
+            "nugget": "1.6.2",
+            "path-exists": "1.0.0",
+            "rc": "1.2.1"
+          }
+        },
         "electron-osx-sign": {
           "version": "0.3.2",
           "resolved": "https://registry.npmjs.org/electron-osx-sign/-/electron-osx-sign-0.3.2.tgz",
@@ -5788,6 +5765,27 @@
           "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
           "dev": true
         },
+        "nugget": {
+          "version": "1.6.2",
+          "resolved": "https://registry.npmjs.org/nugget/-/nugget-1.6.2.tgz",
+          "integrity": "sha1-iMpuA7pXBqmRc/XaCQJZPWvK4Qc=",
+          "dev": true,
+          "requires": {
+            "debug": "2.6.9",
+            "minimist": "1.2.0",
+            "pretty-bytes": "1.0.4",
+            "progress-stream": "1.2.0",
+            "request": "2.82.0",
+            "single-line-log": "0.4.1",
+            "throttleit": "0.0.2"
+          }
+        },
+        "path-exists": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-1.0.0.tgz",
+          "integrity": "sha1-1aiZjrce83p0w06w2eum6HjuoIE=",
+          "dev": true
+        },
         "plist": {
           "version": "1.2.0",
           "resolved": "https://registry.npmjs.org/plist/-/plist-1.2.0.tgz",
@@ -5800,6 +5798,18 @@
             "xmldom": "0.1.27"
           }
         },
+        "single-line-log": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/single-line-log/-/single-line-log-0.4.1.tgz",
+          "integrity": "sha1-h6VWSfdJ14PsDc2AToFA2Yc8fO4=",
+          "dev": true
+        },
+        "throttleit": {
+          "version": "0.0.2",
+          "resolved": "https://registry.npmjs.org/throttleit/-/throttleit-0.0.2.tgz",
+          "integrity": "sha1-z+34jmDADdlpe2H90qg0OptoDq8=",
+          "dev": true
+        },
         "xmlbuilder": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-4.0.0.tgz",
diff --git a/package.json b/package.json
index 46b94552088..a5d64e5773e 100644
--- a/package.json
+++ b/package.json
@@ -137,6 +137,7 @@
     "babel-eslint": "^8.0.3",
     "babel-loader": "^7.1.1",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
+    "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-react-constant-elements": "^6.4.0",
     "babel-plugin-transform-react-inline-elements": "^6.4.0",
     "babel-polyfill": "^6.3.14",