diff --git a/src/server.js b/src/server.js
index ba00bb07..2e5c939e 100644
--- a/src/server.js
+++ b/src/server.js
@@ -101,9 +101,10 @@ app.use((req, res, next) => {
     res.setHeader('Pragma', 'no-cache');
     res.setHeader('Expires', '0');
   }
-  // CSS and JS files: Longer cache (we use version parameters)
+  // CSS and JS files: Short cache for active development
+  // With versioned URLs (?v=timestamp), browsers will fetch new versions when HTML updates
   else if (path.endsWith('.css') || path.endsWith('.js')) {
-    res.setHeader('Cache-Control', 'public, max-age=31536000, immutable'); // 1 year
+    res.setHeader('Cache-Control', 'public, max-age=3600'); // 1 hour - reasonable for active development
   }
   // Images and fonts: Long cache
   else if (path.match(/\.(jpg|jpeg|png|gif|svg|ico|woff|woff2|ttf|eot)$/)) {