diff --git a/damus/ContentView.swift b/damus/ContentView.swift
index d336143b..03df09ec 100644
--- a/damus/ContentView.swift
+++ b/damus/ContentView.swift
@@ -372,6 +372,12 @@ struct ContentView: View {
                 return
             }
             
+            // clear zapper cache for old lud16
+            if profile.lud16 != nil {
+                // TODO: should this be somewhere else, where we process profile events!?
+                invalidate_zapper_cache(pubkey: keypair.pubkey, profiles: ds.profiles, lnurl: ds.lnurls)
+            }
+            
             profile.lud16 = lud16
             let ev = make_metadata_event(keypair: keypair, metadata: profile)
             ds.postbox.send(ev)
diff --git a/damus/Nostr/Profiles.swift b/damus/Nostr/Profiles.swift
index fa3f06d3..cf30d1fa 100644
--- a/damus/Nostr/Profiles.swift
+++ b/damus/Nostr/Profiles.swift
@@ -52,3 +52,9 @@ class Profiles {
         }
     }
 }
+
+
+func invalidate_zapper_cache(pubkey: String, profiles: Profiles, lnurl: LNUrls) {
+    profiles.zappers.removeValue(forKey: pubkey)
+    lnurl.endpoints.removeValue(forKey: pubkey)
+}