diff --git a/packages/core/core/src/Parcel.js b/packages/core/core/src/Parcel.js
index 6aad0bab6d7..861f726fbdf 100644
--- a/packages/core/core/src/Parcel.js
+++ b/packages/core/core/src/Parcel.js
@@ -31,7 +31,7 @@ import ReporterRunner from './ReporterRunner';
 import dumpGraphToGraphViz from './dumpGraphToGraphViz';
 import resolveOptions from './resolveOptions';
 import {ValueEmitter} from '@parcel/events';
-import {registerCoreWithSerializer} from './utils';
+import {registerCoreWithSerializer} from './registerCoreWithSerializer';
 import {AbortController} from 'abortcontroller-polyfill/dist/cjs-ponyfill';
 import {PromiseQueue} from '@parcel/utils';
 import ParcelConfig from './ParcelConfig';
diff --git a/packages/core/core/src/registerCoreWithSerializer.js b/packages/core/core/src/registerCoreWithSerializer.js
new file mode 100644
index 00000000000..17690b85276
--- /dev/null
+++ b/packages/core/core/src/registerCoreWithSerializer.js
@@ -0,0 +1,34 @@
+// @flow
+import {Graph} from '@parcel/graph';
+import {registerSerializableClass} from './serializer';
+import AssetGraph from './AssetGraph';
+import BundleGraph from './BundleGraph';
+import ParcelConfig from './ParcelConfig';
+import {RequestGraph} from './RequestTracker';
+import Config from './public/Config';
+import packageJson from '../package.json';
+
+let coreRegistered;
+export function registerCoreWithSerializer() {
+  if (coreRegistered) {
+    return;
+  }
+  const packageVersion: mixed = packageJson.version;
+  if (typeof packageVersion !== 'string') {
+    throw new Error('Expected package version to be a string');
+  }
+
+  // $FlowFixMe[incompatible-cast]
+  for (let [name, ctor] of (Object.entries({
+    AssetGraph,
+    Config,
+    BundleGraph,
+    Graph,
+    ParcelConfig,
+    RequestGraph,
+    // $FlowFixMe[unclear-type]
+  }): Array<[string, Class<any>]>)) {
+    registerSerializableClass(packageVersion + ':' + name, ctor);
+  }
+  coreRegistered = true;
+}
diff --git a/packages/core/core/src/utils.js b/packages/core/core/src/utils.js
index 19e161b1292..546a758e0b4 100644
--- a/packages/core/core/src/utils.js
+++ b/packages/core/core/src/utils.js
@@ -17,18 +17,8 @@ import type {PackageManager} from '@parcel/package-manager';
 
 import invariant from 'assert';
 import baseX from 'base-x';
-import {Graph} from '@parcel/graph';
 import {hashObject} from '@parcel/utils';
-
-import {registerSerializableClass} from './serializer';
-import AssetGraph from './AssetGraph';
-import BundleGraph from './BundleGraph';
-import ParcelConfig from './ParcelConfig';
-import {RequestGraph} from './RequestTracker';
-import Config from './public/Config';
 import {fromProjectPath, toProjectPath} from './projectPath';
-// flowlint-next-line untyped-import:off
-import packageJson from '../package.json';
 
 const base62 = baseX(
   '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
@@ -48,33 +38,6 @@ export class BuildAbortError extends Error {
   name: string = 'BuildAbortError';
 }
 
-let coreRegistered;
-export function registerCoreWithSerializer() {
-  if (coreRegistered) {
-    return;
-  }
-
-  const packageVersion: mixed = packageJson.version;
-  if (typeof packageVersion !== 'string') {
-    throw new Error('Expected package version to be a string');
-  }
-
-  // $FlowFixMe[incompatible-cast]
-  for (let [name, ctor] of (Object.entries({
-    AssetGraph,
-    Config,
-    BundleGraph,
-    Graph,
-    ParcelConfig,
-    RequestGraph,
-    // $FlowFixMe[unclear-type]
-  }): Array<[string, Class<any>]>)) {
-    registerSerializableClass(packageVersion + ':' + name, ctor);
-  }
-
-  coreRegistered = true;
-}
-
 export function getPublicId(
   id: string,
   alreadyExists: string => boolean,
diff --git a/packages/core/core/src/worker.js b/packages/core/core/src/worker.js
index 596d7f7d587..63465d09e60 100644
--- a/packages/core/core/src/worker.js
+++ b/packages/core/core/src/worker.js
@@ -21,7 +21,7 @@ import {reportWorker, report} from './ReporterRunner';
 import PackagerRunner, {type PackageRequestResult} from './PackagerRunner';
 import Validation, {type ValidationOpts} from './Validation';
 import ParcelConfig from './ParcelConfig';
-import {registerCoreWithSerializer} from './utils';
+import {registerCoreWithSerializer} from './registerCoreWithSerializer';
 import {clearBuildCaches} from './buildCache';
 import {init as initSourcemaps} from '@parcel/source-map';
 import {init as initRust} from '@parcel/rust';