diff --git a/src/components/SignatureFieldPlacer.tsx b/src/components/SignatureFieldPlacer.tsx
index 7545437..3cf84d3 100644
--- a/src/components/SignatureFieldPlacer.tsx
+++ b/src/components/SignatureFieldPlacer.tsx
@@ -5,12 +5,12 @@ import { Badge } from "@/components/ui/badge";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { ChevronLeft, ChevronRight, X, Pen, Calendar as CalIcon, User as UserIcon } from "lucide-react";
 import { cn } from "@/lib/utils";
+import pdfWorkerUrl from "pdfjs-dist/build/pdf.worker.min.mjs?url";
 
-// Use the bundled worker
-pdfjs.GlobalWorkerOptions.workerSrc = new URL(
-  "pdfjs-dist/build/pdf.worker.min.mjs",
-  import.meta.url
-).toString();
+// Use the bundled worker. The `?url` import lets Vite emit the worker as a
+// hashed asset and return its real URL; `new URL("pdfjs-dist/...", import.meta.url)`
+// does NOT resolve bare node_modules specifiers and 404s in production.
+pdfjs.GlobalWorkerOptions.workerSrc = pdfWorkerUrl;
 
 export interface PlacedField {
   id: string;
diff --git a/src/pages/PublicSignPage.tsx b/src/pages/PublicSignPage.tsx
index bdaae99..1731b53 100644
--- a/src/pages/PublicSignPage.tsx
+++ b/src/pages/PublicSignPage.tsx
@@ -8,11 +8,12 @@ import { useToast } from "@/hooks/use-toast";
 import { FileSignature, CheckCircle2, Loader2, Download, Ban, ChevronLeft, ChevronRight } from "lucide-react";
 import SignaturePad from "@/components/SignaturePad";
 import { format } from "date-fns";
+import pdfWorkerUrl from "pdfjs-dist/build/pdf.worker.min.mjs?url";
 
-pdfjs.GlobalWorkerOptions.workerSrc = new URL(
-  "pdfjs-dist/build/pdf.worker.min.mjs",
-  import.meta.url
-).toString();
+// Vite emits the worker as a hashed asset and returns its real URL. The prior
+// `new URL("pdfjs-dist/...", import.meta.url)` does not resolve a bare
+// node_modules specifier and 404s in production, so the PDF never renders.
+pdfjs.GlobalWorkerOptions.workerSrc = pdfWorkerUrl;
 
 interface Field {
   id: string;