diff --git a/.flowconfig b/.flowconfig
index be21a435e..ca1e816a2 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -41,12 +41,12 @@ suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
 suppress_type=$FixMe
 
-suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(3[0-9]\\|[1-2][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)
-suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(3[0-9]\\|1[0-9]\\|[1-2][0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)?:? #[0-9]+
+suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(4[0-0]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)
+suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(4[0-0]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)?:? #[0-9]+
 suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
 suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 
 unsafe.enable_getters_and_setters=true
 
 [version]
-^0.39.0
+^0.40.0
diff --git a/Examples/UIExplorer/js/ExampleTypes.js b/Examples/UIExplorer/js/ExampleTypes.js
index bf5b7d67d..76ec2dfa3 100644
--- a/Examples/UIExplorer/js/ExampleTypes.js
+++ b/Examples/UIExplorer/js/ExampleTypes.js
@@ -36,5 +36,4 @@ export type ExampleModule = {
   title: string,
   description: string,
   examples: Array<Example>,
-  external?: bool,
 };
diff --git a/local-cli/templates/HelloWorld/_flowconfig b/local-cli/templates/HelloWorld/_flowconfig
index 2ce0ee32d..dcd5fd624 100644
--- a/local-cli/templates/HelloWorld/_flowconfig
+++ b/local-cli/templates/HelloWorld/_flowconfig
@@ -36,12 +36,12 @@ suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
 suppress_type=$FixMe
 
-suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(3[0-9]\\|[1-2][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*\\(react_native_oss\\|react-native\\)[a-z,_]*\\)?)\\)
-suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(3[0-9]\\|1[0-9]\\|[1-2][0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*\\(react_native_oss\\|react-native\\)[a-z,_]*\\)?)\\)?:? #[0-9]+
+suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(4[0-0]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)
+suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(4[0-0]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)?:? #[0-9]+
 suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
 suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 
 unsafe.enable_getters_and_setters=true
 
 [version]
-^0.39.0
+^0.40.0
diff --git a/package.json b/package.json
index bf92e9ae6..8b7eb620a 100644
--- a/package.json
+++ b/package.json
@@ -215,7 +215,7 @@
     "eslint-plugin-babel": "^3.3.0",
     "eslint-plugin-flowtype": "^2.20.0",
     "eslint-plugin-react": "^6.4.1",
-    "flow-bin": "^0.39.0",
+    "flow-bin": "^0.40.0",
     "jest": "19.0.2",
     "jest-repl": "19.0.2",
     "jest-runtime": "19.0.2",
diff --git a/packager/src/Server/index.js b/packager/src/Server/index.js
index 3b21e8773..d6b9f3d21 100644
--- a/packager/src/Server/index.js
+++ b/packager/src/Server/index.js
@@ -173,7 +173,7 @@ class Server {
 
   _opts: {
     assetExts: Array<string>,
-    blacklistRE: ?RegExp,
+    blacklistRE: void | RegExp,
     cacheVersion: string,
     extraNodeModules: {},
     getTransformOptions?: GetTransformOptions,
@@ -185,7 +185,7 @@ class Server {
     reporter: Reporter,
     resetCache: boolean,
     silent: boolean,
-    transformModulePath: ?string,
+    transformModulePath: void | string,
     transformTimeoutInterval: ?number,
     watch: boolean,
   };