diff --git a/src/web/html/includes/header.html b/src/web/html/includes/header.html
index f38a30f7..d591eb42 100644
--- a/src/web/html/includes/header.html
+++ b/src/web/html/includes/header.html
@@ -1,5 +1,5 @@
-<link rel="stylesheet" type="text/css" href="colors.css"/>
-<link rel="stylesheet" type="text/css" href="style.css"/>
+<link rel="stylesheet" type="text/css" href="style.css?v={#VERSION}"/>
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta charset="UTF-8">
-<script type="text/javascript" src="api.js"></script>
+<script type="text/javascript" src="api.js?v={#VERSION}"></script>
+<link rel="stylesheet" type="text/css" href="colors.css?v={#VERSION}"/>
\ No newline at end of file
diff --git a/src/web/html/includes/nav.html b/src/web/html/includes/nav.html
index 3dac1590..9d6b822c 100644
--- a/src/web/html/includes/nav.html
+++ b/src/web/html/includes/nav.html
@@ -1,21 +1,21 @@
 <div class="topnav">
-    <a href="/" class="title">AhoyDTU</a>
+    <a href="/?v={#VERSION}" class="title">AhoyDTU</a>
     <a href="javascript:void(0);" class="icon" onclick="topnav()">
         <span></span>
         <span></span>
         <span></span>
     </a>
     <div id="topnav" class="mobile">
-        <a id="nav3" class="hide" href="/live">Live</a>
-        <a id="nav4" class="hide" href="/serial">Serial / Control</a>
-        <a id="nav5" class="hide" href="/setup">Settings</a>
+        <a id="nav3" class="hide" href="/live?v={#VERSION}">Live</a>
+        <a id="nav4" class="hide" href="/serial?v={#VERSION}">Serial / Control</a>
+        <a id="nav5" class="hide" href="/setup?v={#VERSION}">Settings</a>
         <span class="seperator"></span>
-        <a id="nav6" class="hide" href="/update">Update</a>
-        <a id="nav7" class="hide" href="/system">System</a>
+        <a id="nav6" class="hide" href="/update?v={#VERSION}">Update</a>
+        <a id="nav7" class="hide" href="/system?v={#VERSION}">System</a>
         <span class="seperator"></span>
         <a id="nav8" href="/api" target="_blank">REST API</a>
         <a id="nav9" href="https://ahoydtu.de" target="_blank">Documentation</a>
-        <a id="nav10" href="/about">About</a>
+        <a id="nav10" href="/about?v={#VERSION}">About</a>
         <span class="seperator"></span>
         <a id="nav0" class="hide" href="/login">Login</a>
         <a id="nav1" class="hide" href="/logout">Logout</a>
diff --git a/src/web/web.h b/src/web/web.h
index 6b7aaed1..68174c8b 100644
--- a/src/web/web.h
+++ b/src/web/web.h
@@ -255,6 +255,9 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), update_html, update_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -309,11 +312,15 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), index_html, index_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
         void onLogin(AsyncWebServerRequest *request) {
             DPRINTLN(DBG_VERBOSE, F("onLogin"));
+            DPRINTLN(DBG_WARN, String(mConfig->sys.adminPwd));
 
             if (request->args() > 0) {
                 if (String(request->arg("pwd")) == String(mConfig->sys.adminPwd)) {
@@ -348,6 +355,9 @@ class Web {
             else
                 response = request->beginResponse_P(200, F("text/css"), colorBright_css, colorBright_css_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -356,6 +366,9 @@ class Web {
             mLogoutTimeout = LOGOUT_TIMEOUT;
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/css"), style_css, style_css_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -364,6 +377,9 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/javascript"), api_js, api_js_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -429,6 +445,9 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), setup_html, setup_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -604,6 +623,9 @@ class Web {
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), visualization_html, visualization_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
             response->addHeader(F("content-type"), "text/html; charset=UTF-8");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
 
             request->send(response);
         }
@@ -612,6 +634,9 @@ class Web {
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), about_html, about_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
             response->addHeader(F("content-type"), "text/html; charset=UTF-8");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
 
             request->send(response);
         }
@@ -630,6 +655,9 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), serial_html, serial_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }
 
@@ -641,6 +669,9 @@ class Web {
 
             AsyncWebServerResponse *response = request->beginResponse_P(200, F("text/html; charset=UTF-8"), system_html, system_html_len);
             response->addHeader(F("Content-Encoding"), "gzip");
+            if(request->hasParam("v")) {
+                response->addHeader(F("Cache-Control"), F("max-age=604800"));
+            }
             request->send(response);
         }