diff --git a/main.py b/main.py
index 78ccdeff..4ba37a37 100644
--- a/main.py
+++ b/main.py
@@ -3325,7 +3325,9 @@ class NoCacheStaticFiles(StaticFiles):
         response = await super().get_response(path, scope)
         # Force revalidation for HTML/JS/CSS/JSON so code changes show up
         # immediately after git pull. Other assets (images, fonts) can cache.
-        if any(path.endswith(ext) for ext in (".html", ".js", ".css", ".json")):
+        # Empty path ("") or paths ending in / resolve to index.html via html=True.
+        is_html_route = path == "" or path.endswith("/") or path.endswith(".html")
+        if is_html_route or any(path.endswith(ext) for ext in (".js", ".css", ".json")):
             response.headers["Cache-Control"] = "no-cache, must-revalidate"
         return response