diff --git a/package.json b/package.json
index 15b8066ace317..5a14dbe47d314 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "eslint-plugin-flowtype": "^2.25.0",
     "eslint-plugin-react": "^6.7.1",
     "eslint-plugin-react-internal": "file:eslint-rules",
-    "fbjs": "^0.8.5",
+    "fbjs": "^0.8.9",
     "fbjs-scripts": "^0.6.0",
     "flow-bin": "^0.37.0",
     "glob": "^6.0.1",
diff --git a/packages/react-addons/package.json b/packages/react-addons/package.json
index d13443e870d39..41e183940ed8b 100644
--- a/packages/react-addons/package.json
+++ b/packages/react-addons/package.json
@@ -9,7 +9,7 @@
   ],
   "license": "BSD-3-Clause",
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "object-assign": "^4.1.0"
   },
   "peerDependencies": {
diff --git a/packages/react-dom/package.json b/packages/react-dom/package.json
index 31efc122e60c4..09de076a4c06c 100644
--- a/packages/react-dom/package.json
+++ b/packages/react-dom/package.json
@@ -13,7 +13,7 @@
   },
   "homepage": "https://facebook.github.io/react/",
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "loose-envify": "^1.1.0",
     "object-assign": "^4.1.0"
   },
diff --git a/packages/react-native-renderer/package.json b/packages/react-native-renderer/package.json
index b4b1d5f361975..8e8c298388c53 100644
--- a/packages/react-native-renderer/package.json
+++ b/packages/react-native-renderer/package.json
@@ -14,7 +14,7 @@
   },
   "homepage": "https://facebook.github.io/react-native/",
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "object-assign": "^4.1.0"
   },
   "peerDependencies": {
diff --git a/packages/react-noop-renderer/package.json b/packages/react-noop-renderer/package.json
index 0485dac21c67f..cc9deb88a3138 100644
--- a/packages/react-noop-renderer/package.json
+++ b/packages/react-noop-renderer/package.json
@@ -7,7 +7,7 @@
   "repository": "facebook/react",
   "license": "BSD-3-Clause",
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "object-assign": "^4.1.0"
   },
   "files": [
diff --git a/packages/react-test-renderer/package.json b/packages/react-test-renderer/package.json
index 868064fe20e4c..867b0c72fc1fd 100644
--- a/packages/react-test-renderer/package.json
+++ b/packages/react-test-renderer/package.json
@@ -15,7 +15,7 @@
   },
   "homepage": "https://facebook.github.io/react/",
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "object-assign": "^4.1.0"
   },
   "peerDependencies": {
diff --git a/packages/react/package.json b/packages/react/package.json
index 654d41a7d9e0a..da37b768f290c 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -23,7 +23,7 @@
     "node": ">=0.10.0"
   },
   "dependencies": {
-    "fbjs": "^0.8.4",
+    "fbjs": "^0.8.9",
     "loose-envify": "^1.1.0",
     "object-assign": "^4.1.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 240e586d2d610..450e2aba8209c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2049,15 +2049,16 @@ fbjs-scripts@^0.6.0:
     semver "^5.1.0"
     through2 "^2.0.0"
 
-fbjs@^0.8.5:
-  version "0.8.6"
-  resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.6.tgz#7eb67d6986b2d5007a9b6e92e0e7cb6f75cad290"
+fbjs@^0.8.9:
+  version "0.8.9"
+  resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.9.tgz#180247fbd347dcc9004517b904f865400a0c8f14"
   dependencies:
     core-js "^1.0.0"
     isomorphic-fetch "^2.1.1"
     loose-envify "^1.0.0"
     object-assign "^4.1.0"
     promise "^7.1.1"
+    setimmediate "^1.0.5"
     ua-parser-js "^0.7.9"
 
 figures@^1.3.5:
@@ -3930,11 +3931,7 @@ object-assign@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-3.0.0.tgz#9bedd5ca0897949bca47e7ff408062d549f587f2"
 
-object-assign@^4.0.1, object-assign@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
-
-object-assign@^4.1.1:
+object-assign@^4.0.1, object-assign@^4.1.0, object-assign@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
@@ -4585,6 +4582,10 @@ set-immediate-shim@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz#4b2b1b27eb808a9f8dcc481a58e5e56f599f3f61"
 
+setimmediate@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"
+
 sha.js@^2.3.6, sha.js@~2.4.4:
   version "2.4.8"
   resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.8.tgz#37068c2c476b6baf402d14a49c67f597921f634f"