diff --git a/models/curated_package/protocols/nado/silver/silver__nado_market_depth.sql b/models/curated_package/protocols/nado/silver/silver__nado_market_depth.sql
index e6085ef6..00a141a5 100644
--- a/models/curated_package/protocols/nado/silver/silver__nado_market_depth.sql
+++ b/models/curated_package/protocols/nado/silver/silver__nado_market_depth.sql
@@ -8,7 +8,7 @@
     materialized = 'incremental',
     incremental_strategy = 'merge',
     full_refresh = false,
-    unique_key = ['product_id','hour','price'],
+    unique_key = ['product_id','hour','price','orderbook_side'],
     cluster_by = ['hour::DATE'],
     tags = ['silver','curated','nado']
 ) }}
@@ -102,7 +102,7 @@ WITH market_depth AS ({% for item in range(55) %}
 SELECT
     *,
     {{ dbt_utils.generate_surrogate_key(
-        ['product_id','hour','price']
+        ['product_id','hour','price','orderbook_side']
     ) }} AS nado_market_depth_id,
     SYSDATE() AS inserted_timestamp,
     '{{ invocation_id }}' AS _invocation_id