diff --git a/package.json b/package.json
index b4f428d3..a6c67fa5 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "dependencies": {
     "buffer": "^5.2.1",
     "elliptic": "^6.4.0",
-    "ethereumjs-abi": "0.6.5",
+    "ethereumjs-abi": "^0.6.8",
     "ethereumjs-util": "^5.1.1",
     "tweetnacl": "^1.0.0",
     "tweetnacl-util": "^0.15.0"
diff --git a/yarn.lock b/yarn.lock
index 159a384b..9b9f4c37 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -23,6 +23,13 @@
   resolved "https://registry.yarnpkg.com/@metamask/eslint-config/-/eslint-config-2.1.0.tgz#36b5592ed5e322750b790959517fcb4aaaff9896"
   integrity sha512-MjpcXCeMu8hULHxqgrgtvYYsZQHpsOWM4VF4DzKMquXAfaaNgiAvcAT1lKeqYD+RobBf/kqChCu5ASysnmTC1Q==
 
+"@types/bn.js@^4.11.3":
+  version "4.11.6"
+  resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-4.11.6.tgz#c306c70d9358aaea33cd4eda092a742b9505967c"
+  integrity sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==
+  dependencies:
+    "@types/node" "*"
+
 "@types/color-name@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
@@ -38,7 +45,7 @@
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.4.tgz#38fd73ddfd9b55abb1e1b2ed578cb55bd7b7d339"
   integrity sha512-8+KAKzEvSUdeo+kmqnKrqgeE+LcA0tjYWFY7RPProVYwnqDjukzO+3b6dLD56rYX5TdWejnEOLJYOIeh4CXKuA==
 
-"@types/node@^10.17.13":
+"@types/node@*", "@types/node@^10.17.13":
   version "10.17.17"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.17.17.tgz#7a183163a9e6ff720d86502db23ba4aade5999b8"
   integrity sha512-gpNnRnZP3VWzzj5k3qrpRC6Rk3H/uclhAVo1aIvwzK5p5cOrs9yEyQ8H/HBsBY0u5rrWxXEiVPQ0dEB6pkjE8Q==
@@ -351,7 +358,7 @@ bl@^4.0.1:
     inherits "^2.0.4"
     readable-stream "^3.4.0"
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.10.0, bn.js@^4.11.0, bn.js@^4.11.1, bn.js@^4.11.8, bn.js@^4.4.0, bn.js@^4.8.0:
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.11.0, bn.js@^4.11.1, bn.js@^4.11.8, bn.js@^4.4.0:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
   integrity sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==
@@ -442,14 +449,6 @@ browserify-rsa@^4.0.0:
     bn.js "^4.1.0"
     randombytes "^2.0.1"
 
-browserify-sha3@^0.0.4:
-  version "0.0.4"
-  resolved "https://registry.yarnpkg.com/browserify-sha3/-/browserify-sha3-0.0.4.tgz#086c47b8c82316c9d47022c26185954576dd8e26"
-  integrity sha1-CGxHuMgjFsnUcCLCYYWVRXbdjiY=
-  dependencies:
-    js-sha3 "^0.6.1"
-    safe-buffer "^5.1.1"
-
 browserify-sign@^4.0.0:
   version "4.0.4"
   resolved "https://registry.yarnpkg.com/browserify-sign/-/browserify-sign-4.0.4.tgz#aa4eb68e5d7b658baa6bf6a57e630cbd7a93d298"
@@ -1215,24 +1214,13 @@ esutils@^2.0.2:
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.3.tgz#74d2eb4de0b8da1293711910d50775b9b710ef64"
   integrity sha512-kVscqXk4OCp68SZ0dkgEKVi6/8ij300KBWTJq32P/dYeWTSwK41WyTxalN1eRmA5Z9UU/LX9D7FWSmV9SAYx6g==
 
-ethereumjs-abi@0.6.5:
-  version "0.6.5"
-  resolved "https://registry.yarnpkg.com/ethereumjs-abi/-/ethereumjs-abi-0.6.5.tgz#5a637ef16ab43473fa72a29ad90871405b3f5241"
-  integrity sha1-WmN+8Wq0NHP6cqKa2QhxQFs/UkE=
+ethereumjs-abi@^0.6.8:
+  version "0.6.8"
+  resolved "https://registry.yarnpkg.com/ethereumjs-abi/-/ethereumjs-abi-0.6.8.tgz#71bc152db099f70e62f108b7cdfca1b362c6fcae"
+  integrity sha512-Tx0r/iXI6r+lRsdvkFDlut0N08jWMnKRZ6Gkq+Nmw75lZe4e6o3EkSnkaBP5NF6+m5PTGAr9JP43N3LyeoglsA==
   dependencies:
-    bn.js "^4.10.0"
-    ethereumjs-util "^4.3.0"
-
-ethereumjs-util@^4.3.0:
-  version "4.5.0"
-  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-4.5.0.tgz#3e9428b317eebda3d7260d854fddda954b1f1bc6"
-  integrity sha1-PpQosxfuvaPXJg2FT93alUsfG8Y=
-  dependencies:
-    bn.js "^4.8.0"
-    create-hash "^1.1.2"
-    keccakjs "^0.2.0"
-    rlp "^2.0.0"
-    secp256k1 "^3.0.1"
+    bn.js "^4.11.8"
+    ethereumjs-util "^6.0.0"
 
 ethereumjs-util@^5.1.1:
   version "5.2.0"
@@ -1247,7 +1235,20 @@ ethereumjs-util@^5.1.1:
     safe-buffer "^5.1.1"
     secp256k1 "^3.0.1"
 
-ethjs-util@^0.1.3:
+ethereumjs-util@^6.0.0:
+  version "6.2.0"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz#23ec79b2488a7d041242f01e25f24e5ad0357960"
+  integrity sha512-vb0XN9J2QGdZGIEKG2vXM+kUdEivUfU6Wmi5y0cg+LRhDYKnXIZ/Lz7XjFbHRR9VIKq2lVGLzGBkA++y2nOdOQ==
+  dependencies:
+    "@types/bn.js" "^4.11.3"
+    bn.js "^4.11.0"
+    create-hash "^1.1.2"
+    ethjs-util "0.1.6"
+    keccak "^2.0.0"
+    rlp "^2.2.3"
+    secp256k1 "^3.0.1"
+
+ethjs-util@0.1.6, ethjs-util@^0.1.3:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/ethjs-util/-/ethjs-util-0.1.6.tgz#f308b62f185f9fe6237132fb2a9818866a5cd536"
   integrity sha512-CUnVOQq7gSpDHZVVrQW8ExxUETWrnrvXYvYz55wOU8Uj4VCgw56XC2B/fVqQN+f7gmrnRHSLVnFAwsCuNwji8w==
@@ -1826,11 +1827,6 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
-js-sha3@^0.6.1:
-  version "0.6.1"
-  resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.6.1.tgz#5b89f77a7477679877f58c4a075240934b1f95c0"
-  integrity sha1-W4n3enR3Z5h39YxKB1JAk0sflcA=
-
 js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -1906,13 +1902,15 @@ keccak@^1.0.2:
     nan "^2.2.1"
     safe-buffer "^5.1.0"
 
-keccakjs@^0.2.0:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/keccakjs/-/keccakjs-0.2.3.tgz#5e4e969ce39689a3861f445d7752ee3477f9fe72"
-  integrity sha512-BjLkNDcfaZ6l8HBG9tH0tpmDv3sS2mA7FNQxFHpCdzP3Gb2MVruXBSuoM66SnVxKJpAr5dKGdkHD+bDokt8fTg==
+keccak@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/keccak/-/keccak-2.1.0.tgz#734ea53f2edcfd0f42cdb8d5f4c358fef052752b"
+  integrity sha512-m1wbJRTo+gWbctZWay9i26v5fFnYkOn7D5PCxJ3fZUGUEb49dE1Pm4BREUYCt/aoO6di7jeoGmhvqN9Nzylm3Q==
   dependencies:
-    browserify-sha3 "^0.0.4"
-    sha3 "^1.2.2"
+    bindings "^1.5.0"
+    inherits "^2.0.4"
+    nan "^2.14.0"
+    safe-buffer "^5.2.0"
 
 labeled-stream-splicer@^2.0.0:
   version "2.0.2"
@@ -2136,11 +2134,6 @@ mute-stream@0.0.8:
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
   integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
 
-nan@2.13.2:
-  version "2.13.2"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
-  integrity sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw==
-
 nan@^2.14.0, nan@^2.2.1:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
@@ -2748,7 +2741,7 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-rlp@^2.0.0:
+rlp@^2.0.0, rlp@^2.2.3:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.2.4.tgz#d6b0e1659e9285fc509a5d169a9bd06f704951c1"
   integrity sha512-fdq2yYCWpAQBhwkZv+Z8o/Z4sPmYm1CUq6P7n6lVTOdb949CnqA0sndXal5C1NleSVSZm6q5F3iEbauyVln/iw==
@@ -2774,6 +2767,11 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2,
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.0.tgz#b74daec49b1148f88c64b68d49b1e815c1f2f519"
   integrity sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==
 
+safe-buffer@^5.2.0:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
@@ -2821,13 +2819,6 @@ sha.js@^2.4.0, sha.js@^2.4.8, sha.js@~2.4.4:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
-sha3@^1.2.2:
-  version "1.2.6"
-  resolved "https://registry.yarnpkg.com/sha3/-/sha3-1.2.6.tgz#102aa3e47dc793e2357902c3cce8760822f9e905"
-  integrity sha512-KgLGmJGrmNB4JWVsAV11Yk6KbvsAiygWJc7t5IebWva/0NukNrjJqhtKhzy3Eiv2AKuGvhZZt7dt1mDo7HkoiQ==
-  dependencies:
-    nan "2.13.2"
-
 shallow-copy@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/shallow-copy/-/shallow-copy-0.0.1.tgz#415f42702d73d810330292cc5ee86eae1a11a170"