diff --git a/package.json b/package.json
index af74e89..dee3638 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,6 @@
     "sequelize": "^4.31.2",
     "web3": "^0.20.4",
     "wyvern-js": "0.1.1",
-    "wyvern-schemas": "^0.3.0"
+    "wyvern-schemas": "^0.6.15"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 9f9c394..3626d1a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -874,6 +874,11 @@ big.js@^3.1.3:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/big.js/-/big.js-3.2.0.tgz#a5fc298b81b9e0dca2e458824784b65c52ba588e"
 
+bignumber.js@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-6.0.0.tgz#bbfa047644609a5af093e9cbd83b0461fa3f6002"
+  integrity sha512-x247jIuy60/+FtMRvscqfxtVHQf8AGx2hm9c6btkgC0x/hp9yt+teISNhvF8WlwRkCc5yF2fDECH8SIMe8j+GA==
+
 "bignumber.js@git+https://github.com/frozeman/bignumber.js-nolookahead.git":
   version "2.0.7"
   resolved "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934"
@@ -4928,15 +4933,18 @@ wyvern-js@0.1.1:
     web3 "^0.20.4"
     webpack "^3.10.0"
 
-wyvern-schemas@^0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/wyvern-schemas/-/wyvern-schemas-0.3.0.tgz#2734df64892c09f7c9fa6b643de712431de6431d"
+wyvern-schemas@^0.6.15:
+  version "0.6.15"
+  resolved "https://registry.yarnpkg.com/wyvern-schemas/-/wyvern-schemas-0.6.15.tgz#9a8dcd7da034893e84793334a567cfe95a3c918c"
+  integrity sha512-lNJNi962s8L/t2HzWof36NGXCeyuDRcqKHp42vgDekj922KeMJQijx7nM/XzoPCRAh0qGgEib8FLZ9R46HTiiA==
   dependencies:
+    "@0xproject/utils" "^0.3.4"
     axios "^0.17.1"
     babel-cli "^6.26.0"
     babel-plugin-transform-async-to-generator "^6.24.1"
     babel-plugin-transform-runtime "^6.23.0"
     babel-preset-env "^1.6.1"
+    bignumber.js "^6.0.0"
     js-yaml "^3.10.0"
     mocha "^5.0.1"
     typed-promisify "^0.4.0"