diff --git a/src/App/Validation/DNS.purs b/src/App/Validation/DNS.purs
index 8a1429a..54cc084 100644
--- a/src/App/Validation/DNS.purs
+++ b/src/App/Validation/DNS.purs
@@ -263,14 +263,14 @@ validationSPF form = ado
              , v = form.v, mechanisms = Just mechanisms
              , modifiers = Just modifiers, q = form.q }
 
--- | Accepted RSA key sizes = 2048 or 4096 bits, 256 bits for ED25519.
+-- | Accepted RSA key sizes = 1024, 2048 or 4096 bits, 256 bits for ED25519.
 -- |
 -- | Since the public key representation for the RSA algorithm is in PKCS format (RFC 5958)
 -- | then converted in PEM (RFC 7468), and knowing this format enables some optional parameters,
 -- | it is not possible to expect an exact size for the public key input.
--- | Consequently, we expect *at least* an input of 250 bytes for public key, loosely leading
--- | to accept key sizes of at least 2048 bits. Maximum allowed key size is also arbitrary.
-rsa_min_key_size = 250  :: Int
+-- | Consequently, we expect *at least* an input of 128 bytes for public key, loosely leading
+-- | to accept key sizes of at least 1024 bits. Maximum allowed key size is also arbitrary.
+rsa_min_key_size = 128  :: Int
 rsa_max_key_size = 1000 :: Int
 
 -- | Contrary to RSA, ED25519 doesn't use a PEM-converted PKCS representation to exchange