diff --git a/examples/actix-web-example/src/main.rs b/examples/actix-web-example/src/main.rs
index afbfc11..a81c25c 100644
--- a/examples/actix-web-example/src/main.rs
+++ b/examples/actix-web-example/src/main.rs
@@ -6,7 +6,7 @@ use apub_core::{
     deref::{Dereference, Repo},
     ingest::Ingest,
 };
-use apub_rustcrypto::{RsaVerifier, RustcryptoError};
+use apub_rustcrypto::{RsaVerifier, RustcryptoError, Sha256Digest};
 use dashmap::DashMap;
 use example_types::{AcceptedActivity, ActivityType, ObjectId};
 use std::{
@@ -90,6 +90,7 @@ where
     type Error = ServerError;
     type VerifyError = ServerError;
     type Verifier = MemoryRepo;
+    type Digest = Sha256Digest;
 
     fn verifier(&self) -> Self::Verifier {
         self.clone()