diff --git a/apps/server/scripts/build.ts b/apps/server/scripts/build.ts
index 6e0c53adf..c315f32b2 100644
--- a/apps/server/scripts/build.ts
+++ b/apps/server/scripts/build.ts
@@ -17,6 +17,9 @@ async function main() {
     // Integrate the client.
     build.triggerBuildAndCopyTo("apps/client", "public/");
     build.deleteFromOutput("public/webpack-stats.json");
+
+    // pdf.js
+    build.triggerBuildAndCopyTo("packages/pdfjs-viewer", "pdfjs-viewer");
 }
 
 main();
diff --git a/apps/server/src/routes/assets.ts b/apps/server/src/routes/assets.ts
index 4eacc3a1c..983c482c4 100644
--- a/apps/server/src/routes/assets.ts
+++ b/apps/server/src/routes/assets.ts
@@ -73,7 +73,7 @@ export function getPdfjsAssetDir() {
         return path.join(srcRoot, "../../packages/pdfjs-viewer/dist");
     }
     const resourceDir = getResourceDir();
-    return path.join(resourceDir, "pdfjs-viewer/assets");
+    return path.join(resourceDir, "pdfjs-viewer");
 }
 
 export function getClientDir() {