diff --git a/nginx.conf b/nginx.conf
index eee0bb3..b7b147e 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -9,11 +9,19 @@ server {
         try_files $uri $uri/ =404;
     }
     
-    # Prevent caching of JavaScript files and version.json
-    location ~* \.(js|mjs)$ {
-        add_header Cache-Control "no-cache, no-store, must-revalidate";
-        add_header Pragma "no-cache";
-        add_header Expires "0";
+    # Cache JavaScript files with version query params for 1 year (immutable)
+    # Files without version params are not cached
+    location ~* \.(js|mjs)(\?v=[^&]+)?$ {
+        if ($args ~ "v=") {
+            # Has version param - cache for 1 year (immutable)
+            add_header Cache-Control "public, max-age=31536000, immutable";
+        }
+        if ($args !~ "v=") {
+            # No version param - don't cache
+            add_header Cache-Control "no-cache, no-store, must-revalidate";
+            add_header Pragma "no-cache";
+            add_header Expires "0";
+        }
         add_header Vary "Accept-Encoding";
     }