diff --git a/doc/reference.conf b/doc/reference.conf
index c499a365..98d323a8 100644
--- a/doc/reference.conf
+++ b/doc/reference.conf
@@ -1420,7 +1420,7 @@ general {
 	 * not change unless the private key is changed.  This allows the fingerprint to stay
 	 * constant even if the certificate is reissued.  These fingerprints will be prefixed with
 	 * "SPKI:SHA2-256:" or "SPKI:SHA2-512:" depending on the hash type.  These fingerprints
-	 * are not supported on servers running charybdis 3.5 or earlier.
+	 * are not supported on servers running charybdis 3.5.3 or earlier.
 	 *
 	 * To generate a fingerprint from a certificate file, please use the mkfingerprint utility
 	 * program located in the bin/ subdirectory of your IRCd installation. Running it with no