diff --git a/.flowconfig b/.flowconfig
index 4a9d4aac7f3..510c8f3349c 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -14,4 +14,4 @@
 [options]
 
 [version]
-0.38.0
+0.42.0
diff --git a/package.json b/package.json
index e60a7099dca..06b011662fc 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "eslint-config-mourner": "^2.0.0",
     "eslint-plugin-flowtype": "^2.20.0",
     "eslint-plugin-html": "^2.0.0",
-    "flow-bin": "^0.38.0",
+    "flow-bin": "^0.42.0",
     "flow-remove-types": "^1.0.4",
     "github-slugger": "^1.1.1",
     "gl": "^4.0.1",
diff --git a/yarn.lock b/yarn.lock
index b5bbfb9d1c0..75b23295753 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2412,9 +2412,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.38.0:
-  version "0.38.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.38.0.tgz#3ae096d401c969cc8b5798253fb82381e2d0237a"
+flow-bin@^0.42.0:
+  version "0.42.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.42.0.tgz#05dd754b6b052de7b150f9210e2160746961e3cf"
 
 flow-remove-types@^1.0.4, flow-remove-types@^1.1.2:
   version "1.2.0"