diff --git a/models/stg_marketo__lead.sql b/models/stg_marketo__lead.sql
index 40e4b93..2e546bb 100644
--- a/models/stg_marketo__lead.sql
+++ b/models/stg_marketo__lead.sql
@@ -20,7 +20,7 @@ with leads as (
         cast(merged_lead_id as INT64) as lead_id,
         cast(lead_id as string) as merged_into_lead_id
         {% else %}
-        cast(merged_lead_id as integer) as lead_id,
+        try_cast(merged_lead_id as integer) as lead_id,
         cast(lead_id as varchar) as merged_into_lead_id
         {% endif %}
     from merged_leads
@@ -39,4 +39,4 @@ with leads as (
 )
 
 select *
-from joined
\ No newline at end of file
+from joined