diff --git a/.flowconfig b/.flowconfig
index f6d9c3102ab..9183349de79 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -36,4 +36,4 @@ untyped-import
 untyped-type-import
 
 [version]
-0.180.0
+0.181.0
diff --git a/package.json b/package.json
index 6970546ffaf..054a1b83962 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "@types/node": "^15.12.4",
     "cross-env": "^7.0.0",
     "eslint": "^7.20.0",
-    "flow-bin": "0.180.0",
+    "flow-bin": "0.181.0",
     "glob": "^7.1.6",
     "gulp": "^4.0.2",
     "gulp-babel": "^8.0.0",
diff --git a/packages/core/core/src/dumpGraphToGraphViz.js b/packages/core/core/src/dumpGraphToGraphViz.js
index e0c6799636d..aa54975b20f 100644
--- a/packages/core/core/src/dumpGraphToGraphViz.js
+++ b/packages/core/core/src/dumpGraphToGraphViz.js
@@ -33,7 +33,6 @@ const TYPE_COLORS = {
 };
 
 export default async function dumpGraphToGraphViz(
-  // $FlowFixMe
   graph:
     | Graph<AssetGraphNode>
     | Graph<{|
@@ -137,15 +136,12 @@ export default async function dumpGraphToGraphViz(
         }
       } else if (node.type === 'asset_group') {
         if (node.deferred) label += '(deferred)';
-        // $FlowFixMe
       } else if (node.type === 'file') {
         label += path.basename(node.value.filePath);
-        // $FlowFixMe
       } else if (node.type === 'transformer_request') {
         label +=
           path.basename(node.value.filePath) +
           ` (${getEnvDescription(node.value.env)})`;
-        // $FlowFixMe
       } else if (node.type === 'bundle') {
         let parts = [];
         if (node.value.needsStableName) parts.push('stable name');
@@ -153,7 +149,6 @@ export default async function dumpGraphToGraphViz(
         parts.push('bb:' + (node.value.bundleBehavior ?? 'null'));
         if (parts.length) label += ' (' + parts.join(', ') + ')';
         if (node.value.env) label += ` (${getEnvDescription(node.value.env)})`;
-        // $FlowFixMe
       } else if (node.type === 'request') {
         label = node.value.type + ':' + node.id;
       }
diff --git a/packages/core/core/src/public/Symbols.js b/packages/core/core/src/public/Symbols.js
index cca19f14c0d..82ae6e3ae70 100644
--- a/packages/core/core/src/public/Symbols.js
+++ b/packages/core/core/src/public/Symbols.js
@@ -75,7 +75,6 @@ export class AssetSymbols implements IAssetSymbols {
   }
 
   exportSymbols(): Iterable<ISymbol> {
-    // $FlowFixMe
     return this.#value.symbols?.keys() ?? [];
   }
   // $FlowFixMe
diff --git a/packages/core/core/src/serializerCore.js b/packages/core/core/src/serializerCore.js
index 124a042861f..67ddc94c0bd 100644
--- a/packages/core/core/src/serializerCore.js
+++ b/packages/core/core/src/serializerCore.js
@@ -1,7 +1,5 @@
 // @flow
 import v8 from 'v8';
 
-// $FlowFixMe - Flow doesn't know about this method yet
 export let serializeRaw: any => Buffer = v8.serialize;
-// $FlowFixMe - Flow doesn't know about this method yet
 export let deserializeRaw: Buffer => any = v8.deserialize;
diff --git a/packages/core/test-utils/src/utils.js b/packages/core/test-utils/src/utils.js
index bf273979da9..4642db29dd3 100644
--- a/packages/core/test-utils/src/utils.js
+++ b/packages/core/test-utils/src/utils.js
@@ -1130,7 +1130,6 @@ export async function assertNoFilePathInCache(
         if (contents.includes(projectRoot)) {
           let deserialized;
           try {
-            // $FlowFixMe
             deserialized = v8.deserialize(contents);
           } catch (err) {
             // rudimentary detection of binary files
diff --git a/packages/core/workers/src/child.js b/packages/core/workers/src/child.js
index 73da6006396..e38027e5c1a 100644
--- a/packages/core/workers/src/child.js
+++ b/packages/core/workers/src/child.js
@@ -163,7 +163,6 @@ export class Child {
       try {
         let v8 = require('v8');
         result = responseFromContent(
-          // $FlowFixMe
           v8.writeHeapSnapshot(
             'heap-' +
               args[0] +
diff --git a/yarn.lock b/yarn.lock
index db4c0f7ed2b..0ff780849f5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6050,10 +6050,10 @@ flatted@^3.1.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.1.1.tgz#c4b489e80096d9df1dfc97c79871aea7c617c469"
   integrity sha512-zAoAQiudy+r5SvnSw3KJy5os/oRJYHzrzja/tBDqrZtNhUw8bt6y8OBzMWcjWr+8liV8Eb6yOhw8WZ7VFZ5ZzA==
 
-flow-bin@0.180.0:
-  version "0.180.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.180.0.tgz#7a26f3a0cff61e386267e72ef7971d1af73e317a"
-  integrity sha512-jEZoIwOxzrtQ0erUu94nEzlqUoX7OAMeVs0CjO0rN6b7SDBhI5IysVRvGSQkkFWBJpy5VQ9lvzBYzq5Sq9vcmg==
+flow-bin@0.181.0:
+  version "0.181.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.181.0.tgz#0a0ceee391dea166232958826c09ac2973eec9ae"
+  integrity sha512-JVuD0GN9IhAj0WgS3e2BDstTOpx4KmYMTdiVSjeeLud49gs8EN5Ah/Jw59d7rdSXn1fTodoepPe1cKwleDoEag==
 
 flush-write-stream@^1.0.0, flush-write-stream@^1.0.2:
   version "1.1.1"