diff --git a/apub-reqwest/src/lib.rs b/apub-reqwest/src/lib.rs
index 00dfd71..5fdef62 100644
--- a/apub-reqwest/src/lib.rs
+++ b/apub-reqwest/src/lib.rs
@@ -3,10 +3,10 @@
 #![deny(missing_docs)]
 use apub_core::{
     deliver::Deliver,
-    repo::{Dereference, Repo},
     digest::{Digest, DigestBuilder, DigestFactory},
+    repo::{Dereference, Repo},
     session::{Session, SessionError},
-    signature::{Sign, SignFactory},
+    signature::{PrivateKey, Sign},
 };
 use http_signature_normalization_reqwest::{
     digest::{DigestCreate, SignExt},
@@ -88,7 +88,7 @@ pub enum ReqwestError<E: std::error::Error + Send> {
     SignatureError(#[from] SignatureError<E>),
 }
 
-type SignTraitError<S> = <<S as SignFactory>::Signer as Sign>::Error;
+type SignTraitError<S> = <<S as PrivateKey>::Signer as Sign>::Error;
 
 struct DigestWrapper<D>(D);
 
@@ -105,7 +105,7 @@ where
 
 impl<Crypto> ReqwestClient<Crypto>
 where
-    Crypto: SignFactory,
+    Crypto: PrivateKey,
 {
     /// Create a new Client & Repo implementation backed by the reqwest client
     pub fn new(client: Client, config: SignatureConfig, crypto: Crypto) -> Self {
@@ -143,8 +143,7 @@ where
 #[async_trait::async_trait(?Send)]
 impl<Crypto> Repo for ReqwestClient<Crypto>
 where
-    Crypto: SignFactory + Send + Sync,
-    <Crypto as SignFactory>::KeyId: Send,
+    Crypto: PrivateKey + Send + Sync,
 {
     type Error = ReqwestError<SignTraitError<Crypto>>;
 
@@ -160,8 +159,7 @@ where
 #[async_trait::async_trait(?Send)]
 impl<Crypto> Deliver for ReqwestClient<Crypto>
 where
-    Crypto: DigestFactory + SignFactory + Send + Sync,
-    <Crypto as SignFactory>::KeyId: Send,
+    Crypto: DigestFactory + PrivateKey + Send + Sync,
     <Crypto as DigestFactory>::Digest: DigestBuilder + Clone,
 {
     type Error = ReqwestError<SignTraitError<Crypto>>;