diff --git a/netlify.toml b/netlify.toml
index dd1ef8e..d2e5d2f 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -1,3 +1,7 @@
+[build.environment]
+  YARN_VERSION = "1.12.1"
+  NPM_VERSION = "6.4.1"
+
 [build]
   command = "npm run build"
   publish = "dist"
diff --git a/package-lock.json b/package-lock.json
index 4312907..223ac8c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -279,20 +279,6 @@
         "@babel/plugin-syntax-async-generators": "^7.0.0"
       }
     },
-    "@babel/plugin-proposal-class-properties": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.1.0.tgz",
-      "integrity": "sha512-/PCJWN+CKt5v1xcGn4vnuu13QDoV+P7NcICP44BoonAJoPSGwVkgrXihFIQGiEjjPlUDBIw1cM7wYFLARS2/hw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-function-name": "^7.1.0",
-        "@babel/helper-member-expression-to-functions": "^7.0.0",
-        "@babel/helper-optimise-call-expression": "^7.0.0",
-        "@babel/helper-plugin-utils": "^7.0.0",
-        "@babel/helper-replace-supers": "^7.1.0",
-        "@babel/plugin-syntax-class-properties": "^7.0.0"
-      }
-    },
     "@babel/plugin-proposal-json-strings": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-json-strings/-/plugin-proposal-json-strings-7.0.0.tgz",
@@ -343,15 +329,6 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
-    "@babel/plugin-syntax-class-properties": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-class-properties/-/plugin-syntax-class-properties-7.0.0.tgz",
-      "integrity": "sha512-cR12g0Qzn4sgkjrbrzWy2GE7m9vMl/sFkqZ3gIpAQdrvPDnLM8180i+ANDFIXfjHo9aqp0ccJlQ0QNZcFUbf9w==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.0.0"
-      }
-    },
     "@babel/plugin-syntax-json-strings": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-json-strings/-/plugin-syntax-json-strings-7.0.0.tgz",
@@ -560,15 +537,6 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
-    "@babel/plugin-transform-object-assign": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-object-assign/-/plugin-transform-object-assign-7.0.0.tgz",
-      "integrity": "sha512-Dag8mxx7/03oj8F8PkNso8GEMhwGfeT0TL6KfMsa9Brjx4IpwZVl3WBvEmYks8BMhPmrvM5NQ/tjaMbwEj5ijA==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-plugin-utils": "^7.0.0"
-      }
-    },
     "@babel/plugin-transform-object-super": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-object-super/-/plugin-transform-object-super-7.1.0.tgz",
@@ -5233,26 +5201,6 @@
         }
       }
     },
-    "gulp-babel": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/gulp-babel/-/gulp-babel-8.0.0.tgz",
-      "integrity": "sha512-oomaIqDXxFkg7lbpBou/gnUkX51/Y/M2ZfSjL2hdqXTAlSWZcgZtd2o0cOH0r/eE8LWD0+Q/PsLsr2DKOoqToQ==",
-      "dev": true,
-      "requires": {
-        "plugin-error": "^1.0.1",
-        "replace-ext": "^1.0.0",
-        "through2": "^2.0.0",
-        "vinyl-sourcemaps-apply": "^0.2.0"
-      },
-      "dependencies": {
-        "replace-ext": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-1.0.0.tgz",
-          "integrity": "sha1-3mMSg3P8v3w8z6TeWkgMRaZ5WOs=",
-          "dev": true
-        }
-      }
-    },
     "gulp-flatten": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/gulp-flatten/-/gulp-flatten-0.4.0.tgz",
diff --git a/package.json b/package.json
index a70189f..00fa9bb 100644
--- a/package.json
+++ b/package.json
@@ -16,10 +16,8 @@
   "license": "MIT",
   "devDependencies": {
     "@babel/core": "^7.1.2",
-    "@babel/plugin-proposal-class-properties": "^7.1.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
     "@babel/plugin-syntax-object-rest-spread": "^7.0.0",
-    "@babel/plugin-transform-object-assign": "^7.0.0",
     "@babel/preset-env": "^7.1.0",
     "@babel/register": "^7.0.0",
     "babel-eslint": "^10.0.1",
@@ -32,7 +30,6 @@
     "fancy-log": "^1.3.2",
     "file-loader": "^2.0.0",
     "gulp": "^3.9.1",
-    "gulp-babel": "^8.0.0",
     "gulp-flatten": "^0.4.0",
     "gulp-postcss": "^8.0.0",
     "gulp-watch": "^5.0.1",
diff --git a/yarn.lock b/yarn.lock
index 2e3a17f..90177e2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -227,18 +227,6 @@
     "@babel/helper-remap-async-to-generator" "^7.1.0"
     "@babel/plugin-syntax-async-generators" "^7.0.0"
 
-"@babel/plugin-proposal-class-properties@^7.1.0":
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.1.0.tgz#9af01856b1241db60ec8838d84691aa0bd1e8df4"
-  integrity sha512-/PCJWN+CKt5v1xcGn4vnuu13QDoV+P7NcICP44BoonAJoPSGwVkgrXihFIQGiEjjPlUDBIw1cM7wYFLARS2/hw==
-  dependencies:
-    "@babel/helper-function-name" "^7.1.0"
-    "@babel/helper-member-expression-to-functions" "^7.0.0"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
-    "@babel/helper-plugin-utils" "^7.0.0"
-    "@babel/helper-replace-supers" "^7.1.0"
-    "@babel/plugin-syntax-class-properties" "^7.0.0"
-
 "@babel/plugin-proposal-json-strings@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-json-strings/-/plugin-proposal-json-strings-7.0.0.tgz#3b4d7b5cf51e1f2e70f52351d28d44fc2970d01e"
@@ -279,13 +267,6 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-syntax-class-properties@^7.0.0":
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-class-properties/-/plugin-syntax-class-properties-7.0.0.tgz#e051af5d300cbfbcec4a7476e37a803489881634"
-  integrity sha512-cR12g0Qzn4sgkjrbrzWy2GE7m9vMl/sFkqZ3gIpAQdrvPDnLM8180i+ANDFIXfjHo9aqp0ccJlQ0QNZcFUbf9w==
-  dependencies:
-    "@babel/helper-plugin-utils" "^7.0.0"
-
 "@babel/plugin-syntax-json-strings@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-json-strings/-/plugin-syntax-json-strings-7.0.0.tgz#0d259a68090e15b383ce3710e01d5b23f3770cbd"
@@ -452,13 +433,6 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-object-assign@^7.0.0":
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-object-assign/-/plugin-transform-object-assign-7.0.0.tgz#fca6d7500d9675c42868b8f3882979201b9a5ad8"
-  integrity sha512-Dag8mxx7/03oj8F8PkNso8GEMhwGfeT0TL6KfMsa9Brjx4IpwZVl3WBvEmYks8BMhPmrvM5NQ/tjaMbwEj5ijA==
-  dependencies:
-    "@babel/helper-plugin-utils" "^7.0.0"
-
 "@babel/plugin-transform-object-super@^7.1.0":
   version "7.1.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-object-super/-/plugin-transform-object-super-7.1.0.tgz#b1ae194a054b826d8d4ba7ca91486d4ada0f91bb"
@@ -3350,16 +3324,6 @@ graceful-fs@~1.2.0:
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
   integrity sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=
 
-gulp-babel@^8.0.0:
-  version "8.0.0"
-  resolved "https://registry.yarnpkg.com/gulp-babel/-/gulp-babel-8.0.0.tgz#e0da96f4f2ec4a88dd3a3030f476e38ab2126d87"
-  integrity sha512-oomaIqDXxFkg7lbpBou/gnUkX51/Y/M2ZfSjL2hdqXTAlSWZcgZtd2o0cOH0r/eE8LWD0+Q/PsLsr2DKOoqToQ==
-  dependencies:
-    plugin-error "^1.0.1"
-    replace-ext "^1.0.0"
-    through2 "^2.0.0"
-    vinyl-sourcemaps-apply "^0.2.0"
-
 gulp-flatten@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/gulp-flatten/-/gulp-flatten-0.4.0.tgz#d9ac819416c30fd5dfb3dea9da79c83a1bcd61d1"
@@ -7329,7 +7293,7 @@ vinyl-fs@^0.3.0:
     through2 "^0.6.1"
     vinyl "^0.4.0"
 
-vinyl-sourcemaps-apply@^0.2.0, vinyl-sourcemaps-apply@^0.2.1:
+vinyl-sourcemaps-apply@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/vinyl-sourcemaps-apply/-/vinyl-sourcemaps-apply-0.2.1.tgz#ab6549d61d172c2b1b87be5c508d239c8ef87705"
   integrity sha1-q2VJ1h0XLCsbh75cUI0jnI74dwU=