diff --git a/README.md b/README.md
index 001ab5b..7149a68 100644
--- a/README.md
+++ b/README.md
@@ -168,10 +168,37 @@ View real-time logs
 ```bash
 journalctl -fu virt-nexus-timer.service
 ```
-# Test the web application
+### Test the web application
 Verify that the application is accessible via HTTPS:
 ```bash
 curl https://nexus-timer.virtonline.eu
 ```
 Or open it in your browser:
-[https://nexus-timer.virtonline.eu](https://nexus-timer.virtonline.eu)
\ No newline at end of file
+[https://nexus-timer.virtonline.eu](https://nexus-timer.virtonline.eu)
+
+### Update the app
+Make code changes...
+Do not forget to change the cache version
+```bash
+ver=$(grep -oP "CACHE_VERSION = 'nexus-timer-cache-v\K[0-9]+" public/service-worker.js)
+sed -i "s/nexus-timer-cache-v$ver/nexus-timer-cache-v$((ver+1))/" public/service-worker.js
+```
+Commit and push the code changes
+```bash
+git commit -m 'fixed visuals'
+git push
+```
+### Release the update
+Pull the changes on your server
+```bash
+git pull
+```
+Build the docker image and restart the service
+```bash
+docker build -t virt-nexus-timer . && systemctl restart virt-nexus-timer.service
+```
+View real-time logs
+```bash
+journalctl -fu virt-nexus-timer.service
+```
+The previously installed PWA should now offer an upgrade
\ No newline at end of file
diff --git a/public/service-worker.js b/public/service-worker.js
index c4c89e5..186e767 100644
--- a/public/service-worker.js
+++ b/public/service-worker.js
@@ -1,4 +1,4 @@
-const CACHE_VERSION = 'nexus-timer-cache-v3.4';
+const CACHE_VERSION = 'nexus-timer-cache-v4';
 const APP_SHELL_URLS = [
   // '/', // Let NetworkFirst handle '/'
   '/manifest.json',