diff --git a/main.go b/main.go
index e4ea280..e6fefa7 100644
--- a/main.go
+++ b/main.go
@@ -1078,6 +1078,7 @@ func (s *server) handleWhitelist(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "store error", http.StatusInternalServerError)
 			return
 		}
+		s.rebuildIndex()
 		writeJSON(w, map[string]any{
 			"status": "whitelisted_ip",
 			"ip":     addr.String(),
@@ -1352,6 +1353,7 @@ func (s *server) handleBlacklistAdd(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "store error", http.StatusInternalServerError)
 		return
 	}
+	s.rebuildIndex()
 	writeJSON(w, map[string]any{"status": "blacklisted", "prefix": pfx.String(), "reason": strings.TrimSpace(body.Reason)})
 }
 
@@ -1371,6 +1373,7 @@ func (s *server) handleBlacklistDel(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "store error", http.StatusInternalServerError)
 		return
 	}
+	s.rebuildIndex()
 	writeJSON(w, map[string]any{"status": "removed", "prefix": pfx.String()})
 }