diff --git a/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/doc-viewer.component.ts b/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/doc-viewer.component.ts
index 83b3c08d72..14aac5e463 100644
--- a/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/doc-viewer.component.ts
+++ b/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/doc-viewer.component.ts
@@ -29,6 +29,7 @@ import { GqlService } from '../../../services';
 import getRootTypes from '../../../utils/get-root-types';
 import { DocView } from 'altair-graphql-core/build/types/state/docs.interfaces';
 import { AltairConfig } from 'altair-graphql-core/build/config';
+import { getDocUtilsWorkerAsyncClass } from './worker-helper';
 
 @UntilDestroy()
 @Component({
@@ -228,7 +229,7 @@ export class DocViewerComponent implements OnChanges {
   async getDocUtilsWorker() {
     if (!this.docUtilWorker) {
       try {
-        const DocUtils: any = Comlink.wrap(new Worker(new URL('../doc-utils.worker', import.meta.url), { type: 'module' }));
+        const DocUtils: any = getDocUtilsWorkerAsyncClass();
         this.docUtilWorker = await new DocUtils();
       } catch (error) {
         debug.error('Could not load doc utilsweb worker');
diff --git a/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/worker-helper.ts b/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/worker-helper.ts
new file mode 100644
index 0000000000..6bcd6b799d
--- /dev/null
+++ b/packages/altair-app/src/app/modules/altair/components/doc-viewer/doc-viewer/worker-helper.ts
@@ -0,0 +1,3 @@
+import * as Comlink from 'comlink';
+
+export const getDocUtilsWorkerAsyncClass = () => Comlink.wrap(new Worker(new URL('../doc-utils.worker', import.meta.url), { type: 'module' }));
diff --git a/packages/altair-app/src/setup-jest.ts b/packages/altair-app/src/setup-jest.ts
index a5c369c9a1..040c49f2cc 100644
--- a/packages/altair-app/src/setup-jest.ts
+++ b/packages/altair-app/src/setup-jest.ts
@@ -1,4 +1,7 @@
 import 'jest-preset-angular/setup-jest';
+jest.mock('./app/modules/altair/components/doc-viewer/doc-viewer/worker-helper', () => ({
+  getDocUtilsWorkerAsyncClass: () => {},
+}))
 
 /* global mocks for jsdom */
 const mock = () => {
diff --git a/packages/altair-app/tsconfig.json b/packages/altair-app/tsconfig.json
index 1d52b4ed03..f09b980376 100644
--- a/packages/altair-app/tsconfig.json
+++ b/packages/altair-app/tsconfig.json
@@ -17,6 +17,7 @@
     "typeRoots": [
       "node_modules/@types"
     ],
+    "downlevelIteration": true,
     "lib": [
       "es2016",
       "dom",
diff --git a/packages/altair-app/yarn.lock b/packages/altair-app/yarn.lock
index 57de1dbd2d..4581f4e14d 100644
--- a/packages/altair-app/yarn.lock
+++ b/packages/altair-app/yarn.lock
@@ -3484,10 +3484,10 @@ alphanum-sort@^1.0.2:
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
   integrity sha1-l6ERlkmyEa0zaR2fn0hqjsn74KM=
 
-altair-graphql-core@^4.0.9:
-  version "4.0.9"
-  resolved "https://registry.yarnpkg.com/altair-graphql-core/-/altair-graphql-core-4.0.9.tgz#c52fd7238bae91114f94c693646182bdf042c47e"
-  integrity sha512-nL6hCHRanErWaVFVJsVkDmFg1z6iegqywX0W2naovnH7LUHzNFk79lFODMLDtliKqvXa+oQQt+K97emOBpeTVQ==
+altair-graphql-core@^4.0.11:
+  version "4.0.11"
+  resolved "https://registry.yarnpkg.com/altair-graphql-core/-/altair-graphql-core-4.0.11.tgz#1b8466f498a8ff65c80a2d80438b676e4bff8321"
+  integrity sha512-X40N49vEDft8Y/sETzGdzYl4uirfv/kQFxkOy2AFZdP32gYelxWKLdx+qDZMxPY3n92f3y5+X+Zm928gxXxI3w==
   dependencies:
     "@apollo/client" "^3.3.20"
     actioncable "^5.2.6"