diff --git a/crates/adapters/activitypub-base/src/service.rs b/crates/adapters/activitypub-base/src/service.rs
index 857d942..4f64a84 100644
--- a/crates/adapters/activitypub-base/src/service.rs
+++ b/crates/adapters/activitypub-base/src/service.rs
@@ -1336,13 +1336,52 @@ impl domain::ports::FederationActionPort for ActivityPubService {
         &self,
         handle: &str,
     ) -> Result<domain::models::remote_actor::RemoteActor, domain::errors::DomainError> {
-        let data = self.federation_config.to_request_data();
+        use activitypub_federation::fetch::object_id::ObjectId;
+
         let normalized = handle.trim_start_matches('@');
-        let actor: crate::actors::DbActor = webfinger_resolve_actor(normalized, &data)
+        let at = normalized.rfind('@').ok_or_else(|| {
+            domain::errors::DomainError::InvalidInput("handle must be user@domain".into())
+        })?;
+        let (user, domain_str) = (&normalized[..at], &normalized[at + 1..]);
+
+        // Fetch WebFinger over HTTPS directly — the library's webfinger_resolve_actor
+        // tries HTTP first in debug mode, which fails on servers without HTTP→HTTPS redirect.
+        let wf_url = format!(
+            "https://{}/.well-known/webfinger?resource=acct:{}@{}",
+            domain_str, user, domain_str
+        );
+        let wf: serde_json::Value = reqwest::Client::new()
+            .get(&wf_url)
+            .header("Accept", "application/jrd+json, application/json")
+            .send()
+            .await
+            .map_err(|e| domain::errors::DomainError::ExternalService(e.to_string()))?
+            .json()
+            .await
+            .map_err(|e| domain::errors::DomainError::ExternalService(e.to_string()))?;
+
+        let self_href = wf["links"]
+            .as_array()
+            .and_then(|links| {
+                links.iter().find(|l| {
+                    l["rel"].as_str() == Some("self")
+                        && l["type"].as_str() == Some("application/activity+json")
+                })
+            })
+            .and_then(|l| l["href"].as_str())
+            .ok_or(domain::errors::DomainError::NotFound)?;
+
+        let self_url = url::Url::parse(self_href)
+            .map_err(|e| domain::errors::DomainError::ExternalService(e.to_string()))?;
+
+        let data = self.federation_config.to_request_data();
+        let actor: crate::actors::DbActor = ObjectId::from(self_url)
+            .dereference(&data)
             .await
             .map_err(|e: crate::error::Error| {
                 domain::errors::DomainError::ExternalService(e.to_string())
             })?;
+
         Ok(domain::models::remote_actor::RemoteActor {
             url: actor.ap_id.to_string(),
             handle: actor.username.clone(),