diff --git a/src-ui/angular.json b/src-ui/angular.json
index 90a54e133..7e8b38c87 100644
--- a/src-ui/angular.json
+++ b/src-ui/angular.json
@@ -67,8 +67,8 @@
               "src/assets",
               "src/manifest.webmanifest",
               {
-                "glob": "{pdf.worker.min.js,pdf.min.js}",
-                "input": "node_modules/pdfjs-dist/build/",
+                "glob": "{pdf.worker.min.mjs,pdf.min.mjs}",
+                "input": "node_modules/pdfjs-dist/legacy/build/",
                 "output": "/assets/js/"
               }
             ],
diff --git a/src-ui/src/app/app.component.ts b/src-ui/src/app/app.component.ts
index c6de83cd1..7ce6d9494 100644
--- a/src-ui/src/app/app.component.ts
+++ b/src-ui/src/app/app.component.ts
@@ -36,7 +36,7 @@ export class AppComponent implements OnInit, OnDestroy {
     private hotKeyService: HotKeyService
   ) {
     let anyWindow = window as any
-    anyWindow.pdfWorkerSrc = 'assets/js/pdf.worker.min.js'
+    anyWindow.pdfWorkerSrc = 'assets/js/pdf.worker.min.mjs'
     this.settings.updateAppearanceSettings()
   }