diff --git a/package.json b/package.json
index 28c7a946b..c9dcc644d 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "@openzeppelin/hardhat-upgrades": "^1.6.0",
     "axios": "^0.21.1",
     "dotenv": "^8.2.0",
-    "ethereumjs-util": "^7.0.8",
+    "ethereumjs-util": "^7.0.9",
     "ethers": "^5.0.31",
     "ethers-eip712": "^0.2.0",
     "hardhat": "^2.1.1",
diff --git a/yarn.lock b/yarn.lock
index 6696df435..50d009d69 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -785,6 +785,13 @@
   dependencies:
     "@types/node" "*"
 
+"@types/bn.js@^5.1.0":
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-5.1.0.tgz#32c5d271503a12653c62cf4d2b45e6eab8cebc68"
+  integrity sha512-QSSVYj7pYFN49kW77o2s9xTCwZ8F2xLbjLLSEVh8D2F4JUhZtPAGOFLTD+ffqksBx/u4cE/KImFjyhqCjn/LIA==
+  dependencies:
+    "@types/node" "*"
+
 "@types/chai-almost@^1.0.1":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@types/chai-almost/-/chai-almost-1.0.1.tgz#e8a2de03b53c22e9a2dd2c85ef98bde5f19b685c"
@@ -3606,12 +3613,12 @@ ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereum
     rlp "^2.0.0"
     safe-buffer "^5.1.1"
 
-ethereumjs-util@^7.0.2, ethereumjs-util@^7.0.3, ethereumjs-util@^7.0.8:
-  version "7.0.8"
-  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-7.0.8.tgz#5258762b7b17e3d828e41834948363ff0a703ffd"
-  integrity sha512-JJt7tDpCAmDPw/sGoFYeq0guOVqT3pTE9xlEbBmc/nlCij3JRCoS2c96SQ6kXVHOT3xWUNLDm5QCJLQaUnVAtQ==
+ethereumjs-util@^7.0.2, ethereumjs-util@^7.0.3, ethereumjs-util@^7.0.9:
+  version "7.0.9"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-7.0.9.tgz#2038baeb30f370a3e576ec175bd70bbbb6807d42"
+  integrity sha512-cRqvYYKJoitq6vMKMf8pXeVwvTrX+dRD0JwHaYqm8jvogK14tqIoCWH/KUHcRwnVxVXEYF/o6pup5jRG4V0xzg==
   dependencies:
-    "@types/bn.js" "^4.11.3"
+    "@types/bn.js" "^5.1.0"
     bn.js "^5.1.2"
     create-hash "^1.1.2"
     ethereum-cryptography "^0.1.3"
@@ -7358,28 +7365,13 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-rlp@^2.0.0:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.2.3.tgz#7f94aef86cec412df87d5ea1d8cb116a47d45f0e"
-  integrity sha512-l6YVrI7+d2vpW6D6rS05x2Xrmq8oW7v3pieZOJKBEdjuTF4Kz/iwk55Zyh1Zaz+KOB2kC8+2jZlp2u9L4tTzCQ==
-  dependencies:
-    bn.js "^4.11.1"
-    safe-buffer "^5.1.1"
-
-rlp@^2.2.1, rlp@^2.2.2, rlp@^2.2.4:
+rlp@^2.0.0, rlp@^2.2.1, rlp@^2.2.2, rlp@^2.2.3, rlp@^2.2.4:
   version "2.2.6"
   resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.2.6.tgz#c80ba6266ac7a483ef1e69e8e2f056656de2fb2c"
   integrity sha512-HAfAmL6SDYNWPUOJNrM500x4Thn4PZsEy5pijPh40U9WfNk0z15hUYzO9xVIMAdIHdFtD8CBDHd75Td1g36Mjg==
   dependencies:
     bn.js "^4.11.1"
 
-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==
-  dependencies:
-    bn.js "^4.11.1"
-
 run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"
@@ -7409,12 +7401,7 @@ safe-buffer@5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
   integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
 
-safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.0.tgz#b74daec49b1148f88c64b68d49b1e815c1f2f519"
-  integrity sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==
-
-safe-buffer@^5.1.1, safe-buffer@~5.2.0:
+safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, 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==