diff --git a/superset-frontend/src/SqlLab/actions/sqlLab.js b/superset-frontend/src/SqlLab/actions/sqlLab.js
index 00dabfe50f9..894e6b1173e 100644
--- a/superset-frontend/src/SqlLab/actions/sqlLab.js
+++ b/superset-frontend/src/SqlLab/actions/sqlLab.js
@@ -334,7 +334,6 @@ export function runQuery(query, runPreviewOnly) {
     const postPayload = {
       client_id: query.id,
       database_id: query.dbId,
-      json: true,
       runAsync: query.runAsync,
       catalog: query.catalog,
       schema: query.schema,
diff --git a/superset-frontend/src/components/Datasource/components/DatasourceEditor/DatasourceEditor.jsx b/superset-frontend/src/components/Datasource/components/DatasourceEditor/DatasourceEditor.jsx
index a89ae3a8a02..6ea3cf0c320 100644
--- a/superset-frontend/src/components/Datasource/components/DatasourceEditor/DatasourceEditor.jsx
+++ b/superset-frontend/src/components/Datasource/components/DatasourceEditor/DatasourceEditor.jsx
@@ -744,7 +744,6 @@ class DatasourceEditor extends PureComponent {
     this.props.runQuery({
       client_id: this.props.clientId,
       database_id: this.state.datasource.database.id,
-      json: true,
       runAsync: false,
       catalog: this.state.datasource.catalog,
       schema: this.state.datasource.schema,
diff --git a/superset-frontend/src/database/types.ts b/superset-frontend/src/database/types.ts
index 8abfeca5d68..e3aea236c99 100644
--- a/superset-frontend/src/database/types.ts
+++ b/superset-frontend/src/database/types.ts
@@ -20,7 +20,6 @@
 export interface QueryExecutePayload {
   client_id: string;
   database_id: number;
-  json: boolean;
   runAsync: boolean;
   catalog: string | null;
   schema: string;
diff --git a/superset/sqllab/schemas.py b/superset/sqllab/schemas.py
index 5ff3eddca88..3c2413f8d3b 100644
--- a/superset/sqllab/schemas.py
+++ b/superset/sqllab/schemas.py
@@ -71,7 +71,6 @@ class ExecutePayloadSchema(Schema):
     templateParams = fields.String(allow_none=True)  # noqa: N815
     tmp_table_name = fields.String(allow_none=True)
     select_as_cta = fields.Boolean(allow_none=True)
-    json = fields.Boolean(allow_none=True)
     runAsync = fields.Boolean(allow_none=True)  # noqa: N815
     expand_data = fields.Boolean(allow_none=True)
 
diff --git a/superset/views/sql_lab/schemas.py b/superset/views/sql_lab/schemas.py
index ea184cb3973..c9f57d7c023 100644
--- a/superset/views/sql_lab/schemas.py
+++ b/superset/views/sql_lab/schemas.py
@@ -30,6 +30,5 @@ class SqlJsonPayloadSchema(Schema):
     templateParams = fields.String(allow_none=True)  # noqa: N815
     tmp_table_name = fields.String(allow_none=True)
     select_as_cta = fields.Boolean(allow_none=True)
-    json = fields.Boolean(allow_none=True)
     runAsync = fields.Boolean(allow_none=True)  # noqa: N815
     expand_data = fields.Boolean(allow_none=True)