diff --git a/Enabling-U2F-authentication.md b/Enabling-U2F-authentication.md
index 056b529..ab831cb 100644
--- a/Enabling-U2F-authentication.md
+++ b/Enabling-U2F-authentication.md
@@ -11,4 +11,6 @@ docker run -d --name bitwarden \
   bitwardenrs/server:latest
 ```
 
-Note that the value has to include the `https://` and it may include a port at the end (in the format of `https://bw.domain.tld:port`) when not using `443`.
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+Note that the value has to include the `https://` and it may include a port at the end (in the format of `https://bw.domain.tld:port`) when not using `443`.
+
+One must also modify the url from the default-value of "https://vault.bitwarden.com" to the self-hosted-url in the file /web-vault/app-id.json inside the docker container, e.g. using `sed -i -e 's/vault.bitwarden.com/bitwarden.yourhost.com/g' /web-vault/app-id.json`.
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