diff --git a/scripts/patch-obsidian.js b/scripts/patch-obsidian.js
index c11b673..023353e 100644
--- a/scripts/patch-obsidian.js
+++ b/scripts/patch-obsidian.js
@@ -6,6 +6,7 @@
 
 const fs = require("fs");
 const path = require("path");
+const { getVersion } = require("../server/version");
 
 const asarDir = process.argv[2];
 if (!asarDir) {
@@ -13,7 +14,7 @@ if (!asarDir) {
   process.exit(1);
 }
 
-function patchHtml(filePath) {
+function patchHtml(filePath, version) {
   const backupPath = filePath + ".orig";
 
   if (!fs.existsSync(filePath) && !fs.existsSync(backupPath)) {
@@ -46,8 +47,8 @@ function patchHtml(filePath) {
   // Inject ignis scripts before the first <script> tag
   html = html.replace(
     '<script type="text/javascript"',
-    '<script type="text/javascript" src="ignis-ui.js"></script>\n' +
-      '<script type="text/javascript" src="shim-loader.js"></script>\n' +
+    `<script type="text/javascript" src="ignis-ui.js?v=${version}"></script>\n` +
+      `<script type="text/javascript" src="shim-loader.js?v=${version}"></script>\n` +
       '<script type="text/javascript"',
   );
 
@@ -55,4 +56,6 @@ function patchHtml(filePath) {
   console.log(`[patch] Patched ${filePath}`);
 }
 
-patchHtml(path.join(asarDir, "index.html"));
+const version = getVersion();
+patchHtml(path.join(asarDir, "index.html"), version);
+console.log(`[patch] Injected version: ${version}`);
diff --git a/server/index.js b/server/index.js
index c83c42d..6592772 100644
--- a/server/index.js
+++ b/server/index.js
@@ -72,6 +72,20 @@ app.use("/vault-files", (req, res, next) => {
   express.static(vaultPath)(req, res, next);
 });
 
+// Serve dist files with cache headers based on version param
+app.use((req, res, next) => {
+  if (req.path.match(/\/(ignis-ui|shim-loader)\.js$/)) {
+    if (req.query.v) {
+      // Versioned assets - cache for 1 year
+      res.setHeader("Cache-Control", "public, max-age=31536000, immutable");
+    } else {
+      // No version param - short cache for dev/fallback
+      res.setHeader("Cache-Control", "public, max-age=300");
+    }
+  }
+  next();
+});
+
 app.use(express.static(path.join(__dirname, "..", "dist")));
 
 app.use(express.static(config.obsidianAssetsPath));
diff --git a/server/version.js b/server/version.js
new file mode 100644
index 0000000..ed8788d
--- /dev/null
+++ b/server/version.js
@@ -0,0 +1,23 @@
+const fs = require("fs");
+const path = require("path");
+const { execSync } = require("child_process");
+
+function getVersion() {
+  const pkg = JSON.parse(
+    fs.readFileSync(path.join(__dirname, "..", "package.json"), "utf-8"),
+  );
+  const semver = pkg.version;
+
+  let hash;
+  try {
+    hash = execSync("git rev-parse --short=7 HEAD", {
+      encoding: "utf-8",
+    }).trim();
+  } catch (e) {
+    hash = Date.now().toString(36).slice(-7);
+  }
+
+  return `${semver}-${hash}`;
+}
+
+module.exports = { getVersion };