diff --git a/package.json b/package.json
index f2ff143..469ec93 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "@babel/core": "7.5.5",
     "@babel/node": "7.5.5",
-    "@babel/plugin-proposal-class-properties": "7.4.4",
+    "@babel/plugin-proposal-class-properties": "7.5.5",
     "@babel/plugin-transform-runtime": "7.5.5",
     "@babel/preset-env": "7.5.5",
     "babel-eslint": "10.0.2",
diff --git a/yarn.lock b/yarn.lock
index 1bcf09e..a80638f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -77,15 +77,16 @@
     "@babel/traverse" "^7.4.4"
     "@babel/types" "^7.4.4"
 
-"@babel/helper-create-class-features-plugin@^7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.4.4.tgz#fc3d690af6554cc9efc607364a82d48f58736dba"
+"@babel/helper-create-class-features-plugin@^7.5.5":
+  version "7.5.5"
+  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.5.5.tgz#401f302c8ddbc0edd36f7c6b2887d8fa1122e5a4"
+  integrity sha512-ZsxkyYiRA7Bg+ZTRpPvB6AbOFKTFFK4LrvTet8lInm0V468MWCaSYJE+I7v2z2r8KNLtYiV+K5kTCnR7dvyZjg==
   dependencies:
     "@babel/helper-function-name" "^7.1.0"
-    "@babel/helper-member-expression-to-functions" "^7.0.0"
+    "@babel/helper-member-expression-to-functions" "^7.5.5"
     "@babel/helper-optimise-call-expression" "^7.0.0"
     "@babel/helper-plugin-utils" "^7.0.0"
-    "@babel/helper-replace-supers" "^7.4.4"
+    "@babel/helper-replace-supers" "^7.5.5"
     "@babel/helper-split-export-declaration" "^7.4.4"
 
 "@babel/helper-define-map@^7.5.5":
@@ -124,12 +125,6 @@
   dependencies:
     "@babel/types" "^7.4.4"
 
-"@babel/helper-member-expression-to-functions@^7.0.0":
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.0.0.tgz#8cd14b0a0df7ff00f009e7d7a436945f47c7a16f"
-  dependencies:
-    "@babel/types" "^7.0.0"
-
 "@babel/helper-member-expression-to-functions@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.5.5.tgz#1fb5b8ec4453a93c439ee9fe3aeea4a84b76b590"
@@ -197,15 +192,6 @@
     "@babel/traverse" "^7.1.0"
     "@babel/types" "^7.0.0"
 
-"@babel/helper-replace-supers@^7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.4.4.tgz#aee41783ebe4f2d3ab3ae775e1cc6f1a90cefa27"
-  dependencies:
-    "@babel/helper-member-expression-to-functions" "^7.0.0"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
-    "@babel/traverse" "^7.4.4"
-    "@babel/types" "^7.4.4"
-
 "@babel/helper-replace-supers@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.5.5.tgz#f84ce43df031222d2bad068d2626cb5799c34bc2"
@@ -286,11 +272,12 @@
     "@babel/helper-remap-async-to-generator" "^7.1.0"
     "@babel/plugin-syntax-async-generators" "^7.2.0"
 
-"@babel/plugin-proposal-class-properties@7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.4.4.tgz#93a6486eed86d53452ab9bab35e368e9461198ce"
+"@babel/plugin-proposal-class-properties@7.5.5":
+  version "7.5.5"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.5.5.tgz#a974cfae1e37c3110e71f3c6a2e48b8e71958cd4"
+  integrity sha512-AF79FsnWFxjlaosgdi421vmYG6/jg79bVD0dpD44QdgobzHKuLZ6S3vl8la9qIeSwGi8i1fS0O1mfuDAAdo1/A==
   dependencies:
-    "@babel/helper-create-class-features-plugin" "^7.4.4"
+    "@babel/helper-create-class-features-plugin" "^7.5.5"
     "@babel/helper-plugin-utils" "^7.0.0"
 
 "@babel/plugin-proposal-dynamic-import@^7.5.0":