diff --git a/packages/pdfjs-viewer/scripts/build.ts b/packages/pdfjs-viewer/scripts/build.ts
index 9683b31cc7..ff0cd98051 100644
--- a/packages/pdfjs-viewer/scripts/build.ts
+++ b/packages/pdfjs-viewer/scripts/build.ts
@@ -3,6 +3,8 @@ import BuildHelper from "../../../scripts/build-utils";
 import { build as esbuild } from "esbuild";
 import { LOCALES } from "@triliumnext/commons";
 import { watch } from "chokidar";
+import { readFileSync, writeFileSync } from "fs";
+import packageJson from "../package.json" with { type: "json "};
 
 const build = new BuildHelper("packages/pdfjs-viewer");
 const watchMode = process.argv.includes("--watch");
@@ -16,6 +18,7 @@ async function main() {
     for (const file of [ "viewer.css", "viewer.html", "viewer.mjs" ]) {
         build.copy(`viewer/${file}`, `web/${file}`);
     }
+    patchCacheBuster(`${build.outDir}/web/viewer.html`);
     build.copy(`viewer/images`, `web/images`);
 
     // Copy the custom files.
@@ -60,6 +63,21 @@ async function rebuildCustomFiles() {
     build.copy("src/custom.css", "web/custom.css");
 }
 
+function patchCacheBuster(htmlFilePath: string) {
+    const version = packageJson.version;
+    console.log(`Versioned URLs: ${version}.`)
+    let html = readFileSync(htmlFilePath, "utf-8");
+    html = html.replace(
+        `<link rel="stylesheet" href="custom.css" />`,
+        `<link rel="stylesheet" href="custom.css?v=${version}" />`);
+    html = html.replace(
+        `<script src="custom.mjs" type="module"></script>`   ,
+        `<script src="custom.mjs?v=${version}" type="module"></script>`
+    );
+
+    writeFileSync(htmlFilePath, html);
+}
+
 function watchForChanges() {
     console.log("Watching for changes in src directory...");
     const watcher = watch(join(build.projectDir, "src"), {
diff --git a/scripts/update-nightly-version.ts b/scripts/update-nightly-version.ts
index 2c0179331e..71f5a96847 100644
--- a/scripts/update-nightly-version.ts
+++ b/scripts/update-nightly-version.ts
@@ -11,9 +11,9 @@
  *
  */
 
-import { fileURLToPath } from "url";
-import { dirname, join } from "path";
 import fs from "fs";
+import { dirname, join } from "path";
+import { fileURLToPath } from "url";
 
 function processVersion(version) {
     // Remove the beta suffix if any.
@@ -42,14 +42,19 @@ function patchPackageJson(packageJsonPath) {
 
 function main() {
     const scriptDir = dirname(fileURLToPath(import.meta.url));
-    
+
     const rootPackageJson = join(scriptDir, "..", "package.json");
     patchPackageJson(rootPackageJson);
-    
+
     for (const app of ["server", "client"]) {
         const appPackageJsonPath = join(scriptDir, "..", "apps", app, "package.json");
         patchPackageJson(appPackageJsonPath);
     }
+
+    for (const packageName of [ "pdfjs-viewer" ]) {
+        const packageJsonPath = join(scriptDir, "..", "packages", packageName, "package.json");
+        patchPackageJson(packageJsonPath);
+    }
 }
 
 main();