diff --git a/web3.js/package-lock.json b/web3.js/package-lock.json
index ea20bec29a..e22a15762e 100644
--- a/web3.js/package-lock.json
+++ b/web3.js/package-lock.json
@@ -5486,9 +5486,9 @@
       }
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     "flow-bin": {
-      "version": "0.90.0",
-      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.90.0.tgz",
-      "integrity": "sha512-/syDchjhLLL7nELK1ggyWJifGXuMCTz74kvkjR1t9DcmasMrilLl9qAAotsACcNb98etEEJpsCrvP7WL64kadw==",
+      "version": "0.91.0",
+      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.91.0.tgz",
+      "integrity": "sha512-j+L+xNiUYnZZ27MjVI0y2c9474ZHOvdSQq0Tjwh56mEA7tfxYqp5Dcb6aZSwvs3tGMTjCrZow9aUlZf3OoRyDQ==",
       "dev": true
     },
     "flow-typed": {
diff --git a/web3.js/package.json b/web3.js/package.json
index a883c3cc55..f53e4836cc 100644
--- a/web3.js/package.json
+++ b/web3.js/package.json
@@ -102,7 +102,7 @@
     "eslint-plugin-import": "2.14.0",
     "eslint-plugin-jest": "22.1.3",
     "eslint-plugin-prettier": "^3.0.0",
-    "flow-bin": "0.90.0",
+    "flow-bin": "0.91.0",
     "flow-typed": "2.5.1",
     "fs-file-tree": "1.0.7",
     "jest": "23.6.0",