diff --git a/open_prices/api/proofs/filters.py b/open_prices/api/proofs/filters.py
index f6f873f7..12f4bc9b 100644
--- a/open_prices/api/proofs/filters.py
+++ b/open_prices/api/proofs/filters.py
@@ -36,6 +36,7 @@ class Meta:
             "currency",
             "date",
             "owner",
+            "ready_for_price_tag_validation",
             "price_count",
         ]