diff --git a/package.json b/package.json
index efa4c70c..32cfb6a2 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
         "date-fns": "^1.29.0",
         "ethereumjs-tx": "^1.3.3",
         "ethereumjs-units": "^0.2.0",
-        "ethereumjs-util": "^5.1.4",
+        "ethereumjs-util": "^5.2.0",
         "express": "^4.16.3",
         "flow-webpack-plugin": "^1.2.0",
         "git-revision-webpack-plugin": "^3.0.3",
@@ -89,7 +89,6 @@
         "@babel/preset-flow": "^7.0.0",
         "@babel/preset-react": "^7.0.0",
         "@babel/register": "^7.0.0",
-        "babel-core": "^7.0.0-bridge.0",
         "babel-eslint": "^9.0.0",
         "babel-jest": "^24.0.0",
         "babel-loader": "^8.0.5",
diff --git a/yarn.lock b/yarn.lock
index d9efb946..a0a050c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1424,11 +1424,6 @@ babel-core@^6.0.14, babel-core@^6.26.0:
     slash "^1.0.0"
     source-map "^0.5.7"
 
-babel-core@^7.0.0-bridge.0:
-  version "7.0.0-bridge.0"
-  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-7.0.0-bridge.0.tgz#95a492ddd90f9b4e9a4a1da14eb335b87b634ece"
-  integrity sha512-poPX9mZH/5CSanm50Q+1toVci6pv5KSRv/5TWCwtzQS5XEwn40BcCrgIeMFWP9CKKIniKXNxoIOnOq4VVlGXhg==
-
 babel-eslint@^9.0.0:
   version "9.0.0"
   resolved "https://registry.yarnpkg.com/babel-eslint/-/babel-eslint-9.0.0.tgz#7d9445f81ed9f60aff38115f838970df9f2b6220"
@@ -3861,9 +3856,10 @@ ethereumjs-util@^5.0.0:
     rlp "^2.0.0"
     secp256k1 "^3.0.1"
 
-ethereumjs-util@^5.1.4:
-  version "5.1.4"
-  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-5.1.4.tgz#d1a4a9be31eaf8b33aad399894f854fdafda2469"
+ethereumjs-util@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz#3e0c0d1741471acf1036052d048623dee54ad642"
+  integrity sha512-CJAKdI0wgMbQFLlLRtZKGcy/L6pzVRgelIZqRqNbuVFM3K9VEnyfbcvz0ncWMRNCe4kaHWjwRYQcYMucmwsnWA==
   dependencies:
     bn.js "^4.11.0"
     create-hash "^1.1.2"