diff --git a/lingvodoc/utils/search.py b/lingvodoc/utils/search.py
index 4f11676ad..c9e80f72d 100644
--- a/lingvodoc/utils/search.py
+++ b/lingvodoc/utils/search.py
@@ -186,7 +186,7 @@ def find_all_tags(lexical_entry, field_client_id, field_object_id, accepted, pub
         return tags
 
 def get_id_to_field_dict():
-    with open(path.join(path.dirname(__file__), 'static_fields.json')) as f:
+    with open(path.join(path.dirname(__file__), 'static_fields.txt')) as f:
         dict_with_lists = json.load(f)
         dict_with_tuples = {k: tuple(v) for k, v in dict_with_lists.items()}
         return dict_with_tuples
diff --git a/lingvodoc/utils/static_fields.json b/lingvodoc/utils/static_fields.txt
similarity index 100%
rename from lingvodoc/utils/static_fields.json
rename to lingvodoc/utils/static_fields.txt