diff --git a/etc/default_data.json b/etc/default_data.json
index a978ae49d..ae741666d 100644
--- a/etc/default_data.json
+++ b/etc/default_data.json
@@ -13607,6 +13607,11 @@
             "domains": ["fathomdb.com"],
             "company_name": "FathomDB"
         },
+        {
+            "domains": ["firma.seznam.cz"],
+            "company_name": "Seznam.cz",
+            "aliases": ["Seznam.cz, a.s."]
+        },
         {
             "domains": ["fit-tecnologia.org.br"],
             "company_name": "FIT Instituto de Tecnologia",