diff --git a/phono-server/src/routes/mod.rs b/phono-server/src/routes/mod.rs
index 8e860bd..04c235c 100644
--- a/phono-server/src/routes/mod.rs
+++ b/phono-server/src/routes/mod.rs
@@ -55,24 +55,18 @@ pub(crate) fn new_router(app: App) -> Router<()> {
             ServiceBuilder::new()
                 .layer(SetResponseHeaderLayer::if_not_present(
                     CACHE_CONTROL,
-                    HeaderValue::from_static(if cfg!(debug_assertions) {
-                        // Disable caching when developing locally.
-                        "no-cache"
-                    } else {
-                        "max-age=120, stale-while-revalidate=86400"
-                    }),
+                    // JS entrypoints should always be served from the current
+                    // version.
+                    HeaderValue::from_static("no-cache"),
                 ))
                 .service(
                     ServeDir::new("js_dist").not_found_service(
                         ServiceBuilder::new()
                             .layer(SetResponseHeaderLayer::if_not_present(
                                 CACHE_CONTROL,
-                                HeaderValue::from_static(if cfg!(debug_assertions) {
-                                    // Disable caching when developing locally.
-                                    "no-cache"
-                                } else {
-                                    "max-age=120, stale-while-revalidate=86400"
-                                }),
+                                // Do not allow caching of paths if they return
+                                // a 404 error.
+                                HeaderValue::from_static("no-cache"),
                             ))
                             .service(ServeFile::new("static/_404.html")),
                     ),
@@ -95,6 +89,8 @@ pub(crate) fn new_router(app: App) -> Router<()> {
                         ServiceBuilder::new()
                             .layer(SetResponseHeaderLayer::if_not_present(
                                 CACHE_CONTROL,
+                                // Do not allow caching of paths if they return
+                                // a 404 error.
                                 HeaderValue::from_static("no-cache"),
                             ))
                             .service(ServeFile::new("static/_404.html")),