diff --git a/api/api_v1/endpoints/query.py b/api/api_v1/endpoints/query.py
index 4fc1ab5..23fe14c 100644
--- a/api/api_v1/endpoints/query.py
+++ b/api/api_v1/endpoints/query.py
@@ -708,6 +708,8 @@ async def scatter_model(
     res = analysis.scatter_model_sql()
     sql = res['sql']
     df = await ckdb.query_dataframe(sql)
+    df.fillna(0, inplace=True)
+    df['values'] = df['values'].astype(int)
     interval_type = res['interval_type']
     analysis = res['analysis']
     groupby = res['groupby']