diff --git a/nextcloud-aio-helm-chart/readme.md b/nextcloud-aio-helm-chart/readme.md
index e0a3c916..6285aaf3 100755
--- a/nextcloud-aio-helm-chart/readme.md
+++ b/nextcloud-aio-helm-chart/readme.md
@@ -20,6 +20,9 @@ You can run the containers that are build for AIO with Kubernetes using this Hel
 
 First download this file: https://raw.githubusercontent.com/nextcloud/all-in-one/main/nextcloud-aio-helm-chart/values.yaml and adjust at least all values marked with `# TODO!`
 
+Do not use the symbols `@` and `:` in your passwords. These symbols are used to build database
+connection strings. You will experience issues when using these symbols!
+
 Then run:
 
 ```
diff --git a/nextcloud-aio-helm-chart/values.yaml b/nextcloud-aio-helm-chart/values.yaml
index 58276b24..7a0e02ce 100755
--- a/nextcloud-aio-helm-chart/values.yaml
+++ b/nextcloud-aio-helm-chart/values.yaml
@@ -1,3 +1,4 @@
+# Warning: Do not use symbols "@" and ":" in your passwords (see readme.md)
 DATABASE_PASSWORD:           # TODO! This needs to be a unique and good password!
 FULLTEXTSEARCH_PASSWORD:           # TODO! This needs to be a unique and good password!
 IMAGINARY_SECRET:           # TODO! This needs to be a unique and good password!