diff --git a/src/Vervis/Foundation.hs b/src/Vervis/Foundation.hs
index 662b41c..6669b3e 100644
--- a/src/Vervis/Foundation.hs
+++ b/src/Vervis/Foundation.hs
@@ -599,7 +599,8 @@ instance YesodRemoteActorStore App where
 
 instance YesodHttpSig App where
     data HttpSigVerResult App = HttpSigVerResult (Either String FedURI)
-    httpSigVerHeaders = const [hRequestTarget, hHost, hActivityPubActor]
+    httpSigVerRequiredHeaders = const [hRequestTarget, hHost]
+    httpSigVerWantedHeaders = const [hActivityPubActor]
     httpSigVerSeconds =
         fromIntegral . toSeconds . appHttpSigTimeLimit . appSettings
         where