diff --git a/web/kyushu_compare.html b/web/kyushu_compare.html
index 894d818..19c0f83 100644
--- a/web/kyushu_compare.html
+++ b/web/kyushu_compare.html
@@ -76,7 +76,7 @@
 </div>
 
 <script src="/assets/maplibre-gl.js"></script>
-<script src="/s52_runtime_executor.js"></script>
+<script src="/s52_runtime_executor.js?v=ca-geometry-v1"></script>
 <script>
 const REFERENCE_STYLE =
   "https://pbf.jpcn.ccwu.cc/style/style.navsea-delivery-full-semantic-extentfix.json";
@@ -691,7 +691,7 @@ function prepareS52Style(raw){
 
 async function ensureS52StyleTemplate(){
   if(s52StyleTemplate)return s52StyleTemplate;
-  const response=await fetch("/s52/full-style.json",{cache:"no-store"});
+  const response=await fetch("/s52/full-style.json?v=current-release",{cache:"no-store"});
   if(!response.ok)throw new Error("S-52 full style HTTP " + response.status);
   s52StyleTemplate=await response.json();
   return s52StyleTemplate;
diff --git a/web/kyushu_compare_server.py b/web/kyushu_compare_server.py
index 6a0b9b0..f92f6e5 100644
--- a/web/kyushu_compare_server.py
+++ b/web/kyushu_compare_server.py
@@ -58,11 +58,13 @@ def main():
 
     manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
     class Handler(BaseHTTPRequestHandler):
-        def send_bytes(self, data: bytes, content_type: str, status: int = 200):
+        def send_bytes(
+            self, data: bytes, content_type: str, status: int = 200, *, cache_control: str = "no-cache"
+        ):
             self.send_response(status)
             self.send_header("Content-Type", content_type)
             self.send_header("Content-Length", str(len(data)))
-            self.send_header("Cache-Control", "no-cache")
+            self.send_header("Cache-Control", cache_control)
             self.send_header("Access-Control-Allow-Origin", "*")
             self.end_headers()
             self.wfile.write(data)
@@ -71,13 +73,16 @@ def main():
             path = urlparse(self.path).path
 
             if path in ("/", "/index.html", "/compare"):
-                self.send_bytes(html_path.read_bytes(), "text/html; charset=utf-8")
+                self.send_bytes(
+                    html_path.read_bytes(), "text/html; charset=utf-8", cache_control="no-store"
+                )
                 return
 
             if path == "/s52_runtime_executor.js":
                 self.send_bytes(
                     runtime_executor_path.read_bytes(),
                     "application/javascript; charset=utf-8",
+                    cache_control="no-store",
                 )
                 return
 
@@ -100,7 +105,11 @@ def main():
                 return
 
             if path == "/s52/full-style.json":
-                self.send_bytes(s52_style_path.read_bytes(), "application/json; charset=utf-8")
+                self.send_bytes(
+                    s52_style_path.read_bytes(),
+                    "application/json; charset=utf-8",
+                    cache_control="no-store",
+                )
                 return
 
             if path in (