diff --git a/package.json b/package.json
index 59a8fb3..ac13cfe 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "sourcecred": "0.9.0",
     "web3": "1.3.0",
-    "web3-utils": "1.3.0"
+    "web3-utils": "1.6.0"
   },
   "scripts": {
     "clean": "rimraf cache site",
diff --git a/yarn.lock b/yarn.lock
index 1b1de29..17eefd2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -462,6 +462,13 @@
   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/color-name@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
@@ -820,17 +827,12 @@ bn.js@4.11.6:
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.6.tgz#53344adb14617a13f6e8dd2ce28905d1c0ba3215"
   integrity sha1-UzRK2xRhehP26N0s4okF0cC6MhU=
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.0, bn.js@^4.11.1:
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.0, bn.js@^4.11.1, bn.js@^4.11.6, bn.js@^4.11.9, bn.js@^4.4.0:
   version "4.12.0"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
   integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
-bn.js@^4.11.6, bn.js@^4.11.9, bn.js@^4.4.0:
-  version "4.11.9"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
-  integrity sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==
-
-bn.js@^5.0.0, bn.js@^5.1.1:
+bn.js@^5.0.0, bn.js@^5.1.1, bn.js@^5.1.2:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.0.tgz#358860674396c6997771a9d051fcc1b57d4ae002"
   integrity sha512-D7iWRBvnZE8ecXiLj/9wbxH7Tk79fAh8IHaTNq1RWRixsS02W+5qS+iE9yq6RYl0asXx5tw0bLhmT5pIfbSquw==
@@ -1859,6 +1861,18 @@ ethereumjs-util@^6.0.0:
     ethjs-util "0.1.6"
     rlp "^2.2.3"
 
+ethereumjs-util@^7.1.0:
+  version "7.1.2"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-7.1.2.tgz#cfd79a9a3f5cdc042d1abf29964de9caf10ec238"
+  integrity sha512-xCV3PTAhW8Q2k88XZn9VcO4OrjpeXAlDm5LQTaOLp81SjNSSY6+MwuGXrx6vafOMheWSmZGxIXUbue5e9UvUBw==
+  dependencies:
+    "@types/bn.js" "^5.1.0"
+    bn.js "^5.1.2"
+    create-hash "^1.1.2"
+    ethereum-cryptography "^0.1.3"
+    ethjs-util "0.1.6"
+    rlp "^2.2.4"
+
 ethjs-unit@0.1.6:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/ethjs-unit/-/ethjs-unit-0.1.6.tgz#c665921e476e87bce2a9d588a6fe0405b2c41699"
@@ -4141,7 +4155,7 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-rlp@^2.2.3:
+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==
@@ -5162,7 +5176,7 @@ web3-shh@1.3.0:
     web3-core-subscriptions "1.3.0"
     web3-net "1.3.0"
 
-web3-utils@1.3.0, web3-utils@^1.3.0:
+web3-utils@1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.3.0.tgz#5bac16e5e0ec9fe7bdcfadb621655e8aa3cf14e1"
   integrity sha512-2mS5axFCbkhicmoDRuJeuo0TVGQDgC2sPi/5dblfVC+PMtX0efrb8Xlttv/eGkq7X4E83Pds34FH98TP2WOUZA==
@@ -5176,6 +5190,19 @@ web3-utils@1.3.0, web3-utils@^1.3.0:
     underscore "1.9.1"
     utf8 "3.0.0"
 
+web3-utils@1.6.0, web3-utils@^1.3.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.6.0.tgz#1975c5ee5b7db8a0836eb7004848a7cd962d1ddc"
+  integrity sha512-bgCAWAeQnJF035YTFxrcHJ5mGEfTi/McsjqldZiXRwlHK7L1PyOqvXiQLE053dlzvy1kdAxWl/sSSfLMyNUAXg==
+  dependencies:
+    bn.js "^4.11.9"
+    ethereum-bloom-filters "^1.0.6"
+    ethereumjs-util "^7.1.0"
+    ethjs-unit "0.1.6"
+    number-to-bn "1.7.0"
+    randombytes "^2.1.0"
+    utf8 "3.0.0"
+
 web3@1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/web3/-/web3-1.3.0.tgz#8fe4cd6e2a21c91904f343ba75717ee4c76bb349"