diff --git a/package.json b/package.json
index 59a8fb3..6eeb625 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": "1.5.1"
   },
   "scripts": {
     "clean": "rimraf cache site",
diff --git a/yarn.lock b/yarn.lock
index 1b1de29..f5d6eb6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -820,16 +820,11 @@ 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:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.0.tgz#358860674396c6997771a9d051fcc1b57d4ae002"
@@ -5162,7 +5157,7 @@ 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 +5171,19 @@ web3-utils@1.3.0, web3-utils@^1.3.0:
     underscore "1.9.1"
     utf8 "3.0.0"
 
+web3-utils@1.5.1, web3-utils@^1.3.0:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.5.1.tgz#d82087b43c0c0777dec5c44d375afcf1424417f4"
+  integrity sha512-U8ULaMBwjkp9Rn+kRLjUmgAUHwPqDrM5/Q9tPKgvuDKtMWUggTLC33/KF8RY+PyAhSAlnD+lmNGfZnbjmVKBxQ==
+  dependencies:
+    bn.js "^4.11.9"
+    eth-lib "0.2.8"
+    ethereum-bloom-filters "^1.0.6"
+    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"