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-rw-r--r--packages/0x.js/package.json1
1 files changed, 1 insertions, 0 deletions
diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 8278a96f6..7aa360954 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -87,6 +87,7 @@
"bignumber.js": "~4.1.0",
"bn.js": "4.11.8",
"compare-versions": "^3.0.1",
+ "es6-promisify": "^5.0.0",
"ethereumjs-abi": "^0.6.4",
"ethereumjs-blockstream": "^2.0.6",
"ethereumjs-util": "^5.1.1",