diff --git a/content/SSH/Securing_SSH_with_FIDO2.adoc b/content/SSH/Securing_SSH_with_FIDO2.adoc
index b211d083..a4c78a9f 100644
--- a/content/SSH/Securing_SSH_with_FIDO2.adoc
+++ b/content/SSH/Securing_SSH_with_FIDO2.adoc
@@ -11,7 +11,7 @@ This guide provides instructions for integrating FIDO2 with SSH, focusing on res
 == Prerequisites
 
 * OpenSSH 8.3 or newer
-* FIDO2 security key (with ed25519 support)
+* FIDO2 security key with ed25519 support (requires firmware 5.2.3 or higher)
 * YubiKey Manager (for setting the FIDO2 PIN)
 
 == About Using FIDO2 Security Keys for SSH