diff --git a/packages/metro-bundler/src/ModuleGraph/worker/optimize-module.js b/packages/metro-bundler/src/ModuleGraph/worker/optimize-module.js
index f99bc2f0..2359bcd8 100644
--- a/packages/metro-bundler/src/ModuleGraph/worker/optimize-module.js
+++ b/packages/metro-bundler/src/ModuleGraph/worker/optimize-module.js
@@ -47,13 +47,13 @@ function optimizeModule(
   const result = {...details, transformed: {}};
   const {postMinifyProcess} = optimizationOptions;
 
-  Object.entries(
-    transformed,
-    /* $FlowFixMe(>=0.54.0 site=react_native_fb) This comment suppresses an error
-   * found when Flow v0.54 was deployed. To see the error delete this comment
-   * and run Flow. */
-  ).forEach(([k, t: TransformResult]: [*, TransformResult]) => {
-    const optimized = optimize(t, file, code, optimizationOptions);
+  Object.entries(transformed).forEach(([k, t: TransformResult]) => {
+    const optimized = optimize(
+      (t: $FlowFixMe),
+      file,
+      code,
+      optimizationOptions,
+    );
     const processed = postMinifyProcess({
       code: optimized.code,
       map: optimized.map,
@@ -66,7 +66,7 @@ function optimizeModule(
   return {type: 'code', details: result};
 }
 
-function optimize(transformed, file, originalCode, options) {
+function optimize(transformed: TransformResult, file, originalCode, options) {
   const {code, dependencyMapName, map} = transformed;
   const optimized = optimizeCode(code, map, file, options);
 
diff --git a/packages/metro-bundler/src/Resolver/index.js b/packages/metro-bundler/src/Resolver/index.js
index 77041e2f..5386daaf 100644
--- a/packages/metro-bundler/src/Resolver/index.js
+++ b/packages/metro-bundler/src/Resolver/index.js
@@ -130,7 +130,10 @@ class Resolver {
   ): Promise<ResolutionResponse<Module, T>> {
     const {platform, recursive = true, prependPolyfills} = options;
 
-    const resolutionResponse = await this._depGraph.getDependencies({
+    const resolutionResponse: ResolutionResponse<
+      Module,
+      T,
+    > = await this._depGraph.getDependencies({
       entryPath,
       platform,
       options: bundlingOptions,
@@ -144,6 +147,7 @@ class Resolver {
         .forEach(polyfill => resolutionResponse.prependDependency(polyfill));
     }
 
+    /* $FlowFixMe: monkey patching */
     resolutionResponse.getModuleId = getModuleId;
     return resolutionResponse.finalize();
   }
diff --git a/packages/metro-bundler/src/Server/index.js b/packages/metro-bundler/src/Server/index.js
index 99c034d3..feccdb92 100644
--- a/packages/metro-bundler/src/Server/index.js
+++ b/packages/metro-bundler/src/Server/index.js
@@ -668,7 +668,7 @@ class Server {
             }),
             Promise.all(Array.from(outdated, this.getModuleForPath, this)),
           ])
-            .then(([response, changedModules]) => {
+            .then(([response, changedModules]: [$FlowFixMe, *]) => {
               debug('Update bundle: rebuild shallow bundle');
 
               changedModules.forEach(m => {
diff --git a/packages/metro-bundler/yarn.lock b/packages/metro-bundler/yarn.lock
index 4ddf6d8e..9de6dac7 100644
--- a/packages/metro-bundler/yarn.lock
+++ b/packages/metro-bundler/yarn.lock
@@ -1163,17 +1163,17 @@ isstream@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
 
-jest-docblock@20.1.0-echo.1:
-  version "20.1.0-echo.1"
-  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-20.1.0-echo.1.tgz#be02f43ee019f97e6b83267c746ac7b40d290fe8"
+jest-docblock@^21, jest-docblock@^21.0.0:
+  version "21.0.0"
+  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.0.0.tgz#7dd57568543aec98910f749540afc15fab53a27f"
 
-jest-haste-map@20.1.0-echo.1:
-  version "20.1.0-echo.1"
-  resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-20.1.0-echo.1.tgz#6dfd0c97bb51a68a35dd98326e04f994157dce81"
+jest-haste-map@^21:
+  version "21.0.0"
+  resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-21.0.0.tgz#1f099ff6aedb52ec55fa9773ce26e4bbb00b0580"
   dependencies:
     fb-watchman "^2.0.0"
     graceful-fs "^4.1.11"
-    jest-docblock "20.1.0-echo.1"
+    jest-docblock "^21.0.0"
     micromatch "^2.3.11"
     sane "^2.0.0"
     worker-farm "^1.3.1"