diff --git a/backend/main.py b/backend/main.py
index 562fa3a..8d017ca 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -179,7 +179,12 @@ async def add_cache_headers(request: Request, call_next):
         response.headers["Cache-Control"] = NO_CACHE
         response.headers["Pragma"] = "no-cache"
         response.headers["Expires"] = "0"
-    # 2h cache for the rest of the frontend (JS/CSS/icons/etc.)
+    # JS/CSS must revalidate on every load so a deploy takes effect on the next
+    # reload (returns a cheap 304 when unchanged). Without this, a fresh
+    # no-cache index.html could pair with stale 2h-cached scripts.
+    elif path.startswith("/static/js/") or path.startswith("/static/css/"):
+        response.headers["Cache-Control"] = NO_CACHE
+    # 2h cache for the rest of the frontend (icons, fonts, images, …)
     elif path.startswith("/static/") or path.startswith("/icons/"):
         response.headers["Cache-Control"] = STATIC_CACHE
     # SPA fallback (everything else that isn't an API route) returns HTML;
diff --git a/frontend/js/version.js b/frontend/js/version.js
index bb0b7ed..eea63e6 100644
--- a/frontend/js/version.js
+++ b/frontend/js/version.js
@@ -1,2 +1,2 @@
 // Increment APP_VERSION with every code change
-export const APP_VERSION = 'v23';
+export const APP_VERSION = 'v24';