Publish

- @0x/contracts-treasury@1.4.1
 - @0x/contracts-zero-ex@0.29.0
 - @0x/asset-swapper@16.28.0
 - @0x/contract-artifacts@3.16.0
 - @0x/contract-wrappers@13.18.0
 - @0x/migrations@8.1.7
 - @0x/protocol-utils@1.9.1

packages/protocol-utils/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/protocol-utils",
-    "version": "1.9.0",
+    "version": "1.9.1",
     "engines": {
         "node": ">=6.12"
     },
@@ -64,7 +64,7 @@
     "dependencies": {
         "@0x/assert": "^3.0.29",
         "@0x/contract-addresses": "^6.7.0",
-        "@0x/contract-wrappers": "^13.17.7",
+        "@0x/contract-wrappers": "^13.18.0",
         "@0x/json-schemas": "^6.3.0",
         "@0x/subproviders": "^6.6.0",
         "@0x/utils": "^6.4.4",