diff --git a/book/source/08-signing_components.md b/book/source/08-signing_components.md
index 2cb035a..3e50354 100644
--- a/book/source/08-signing_components.md
+++ b/book/source/08-signing_components.md
@@ -406,7 +406,7 @@ In OpenPGP, certain subpackets are universally expected across all types of sign
 * **Issuer Fingerprint**: Essential for signature verification, this subpacket identifies the key (or subkey) used to create the signature. OpenPGP v6 signatures should include the Issuer Fingerprint subpacket, containing the 32-byte fingerprint of the key. 
 
 ```{note}
-The key used as the issuer in the signature might be a subkey of the primary key.
+The key used as the issuer in the signature might be a subkey of the certificate.
 ```
 
 This subpacket can be placed in either the hashed or unhashed area due to its self-authenticating nature. However, it is recommended to include it in the signature's hashed area for enhanced security.