diff --git a/package.json b/package.json
index 23f70ab6c..c023d994e 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
   "dependencies": {
     "another-json": "^0.2.0",
     "babel-runtime": "^6.26.0",
-    "bluebird": "^3.7.0",
+    "bluebird": "3.5.5",
     "browser-request": "^0.3.3",
     "bs58": "^4.0.1",
     "content-type": "^1.0.2",
diff --git a/yarn.lock b/yarn.lock
index 307c2ac88..8fc5beb1a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -919,16 +919,11 @@ binary-extensions@^1.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.13.1.tgz#598afe54755b2868a5330d2aff9d4ebb53209b65"
   integrity sha512-Un7MIEDdUC5gNpcGDV97op1Ywk748MpHcFTHoYs6qnj1Z3j7I53VG3nwZhKzoBZmbdRNnb6WRdFlwl7tSDuZGw==
 
-bluebird@^3.5.0, bluebird@^3.5.4:
+bluebird@3.5.5, bluebird@^3.5.0, bluebird@^3.5.4:
   version "3.5.5"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.5.tgz#a8d0afd73251effbbd5fe384a77d73003c17a71f"
   integrity sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==
 
-bluebird@^3.7.0:
-  version "3.7.0"
-  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.0.tgz#56a6a886e03f6ae577cffedeb524f8f2450293cf"
-  integrity sha512-aBQ1FxIa7kSWCcmKHlcHFlT2jt6J/l4FzC7KcPELkOJOsPOb/bccdhmIrKDfXhwFrmc7vDoDrrepFvGqjyXGJg==
-
 bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.4.0:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"