diff --git a/Enabling-Yubikey-OTP-authentication.md b/Enabling-Yubikey-OTP-authentication.md
index bba78bf..22aaa5a 100644
--- a/Enabling-Yubikey-OTP-authentication.md
+++ b/Enabling-Yubikey-OTP-authentication.md
@@ -2,7 +2,9 @@ To enable YubiKey authentication, you must set the `YUBICO_CLIENT_ID` and `YUBIC
 
 If `YUBICO_SERVER` is not specified, it will use the default YubiCloud servers. You can generate `YUBICO_CLIENT_ID` and `YUBICO_SECRET_KEY` for the default YubiCloud [here](https://upgrade.yubico.com/getapikey/).
 
-Note: In order to generate API keys or use a YubiKey with an OTP server, it must be registered. After configuring your key in the [YubiKey Personalization Tool](https://www.yubico.com/products/services-software/personalization-tools/use/), you can register it with the default servers [here](https://upload.yubico.com/).
+Notes: 
+* In order to generate API keys or use a YubiKey with an OTP server, it must be registered. After configuring your key in the [YubiKey Personalization Tool](https://www.yubico.com/products/services-software/personalization-tools/use/), you can register it with the default servers [here](https://upload.yubico.com/).
+* aarch64 builds of the server do not support Yubikey functionality due to upstream issues - see [#262](https://github.com/dani-garcia/bitwarden_rs/issues/262).
 
 ```sh
 docker run -d --name bitwarden \
@@ -11,4 +13,4 @@ docker run -d --name bitwarden \
   -v /bw-data/:/data/ \
   -p 80:80 \
   mprasil/bitwarden:latest
-```
\ No newline at end of file
+```