diff --git a/README.md b/README.md
index 2ecfc3b..ba4fed2 100644
--- a/README.md
+++ b/README.md
@@ -195,17 +195,19 @@ docker run -d --name bitwarden \
 ```
 Note that you need to mount ssl files and you need to forward appropriate port.
 
+Due to what is likely a certificate validation bug in Android, you need to make sure that your certificate includes the full chain of trust. In the case of certbot, this means using `fullchain.pem` instead of `cert.pem`.
+
 Softwares used for getting certs are often using symlinks. If that is the case, both locations need to be accessible to the docker container.
 
-Example: [certbot](https://certbot.eff.org/) will create a folder that contains the needed `cert.pem` and `privacy.pem` files in `/etc/letsencrypt/live/mydomain/`
+Example: [certbot](https://certbot.eff.org/) will create a folder that contains the needed `fullchain.pem` and `privkey.pem` files in `/etc/letsencrypt/live/mydomain/`
 
-These files are symlinked to `../../archive/mydomain/mykey.pem`
+These files are symlinked to `../../archive/mydomain/privkey.pem`
 
 So to use from bitwarden container:
 
 ```sh
 docker run -d --name bitwarden \
-  -e ROCKET_TLS='{certs="/ssl/live/mydomain/cert.pem",key="/ssl/live/mydomain/privkey.pem"}' \
+  -e ROCKET_TLS='{certs="/ssl/live/mydomain/fullchain.pem",key="/ssl/live/mydomain/privkey.pem"}' \
   -v /etc/letsencrypt/:/ssl/ \
   -v /bw-data/:/data/ \
   -p 443:80 \