diff --git a/superset/charts/api.py b/superset/charts/api.py
index e3f3936f93..602f082b40 100644
--- a/superset/charts/api.py
+++ b/superset/charts/api.py
@@ -1003,7 +1003,7 @@ class ChartRestApi(BaseSupersetModelRestApi):
                       type: string
                     overwrite:
                       description: overwrite existing databases?
-                      type: bool
+                      type: boolean
           responses:
             200:
               description: Chart import result
diff --git a/superset/dashboards/api.py b/superset/dashboards/api.py
index 8c21e0b804..14e92ed2e8 100644
--- a/superset/dashboards/api.py
+++ b/superset/dashboards/api.py
@@ -914,7 +914,7 @@ class DashboardRestApi(BaseSupersetModelRestApi):
                       type: string
                     overwrite:
                       description: overwrite existing databases?
-                      type: bool
+                      type: boolean
           responses:
             200:
               description: Dashboard import result
diff --git a/superset/databases/api.py b/superset/databases/api.py
index 0b0d29718d..c313f64c8a 100644
--- a/superset/databases/api.py
+++ b/superset/databases/api.py
@@ -775,7 +775,7 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
                       type: string
                     overwrite:
                       description: overwrite existing databases?
-                      type: bool
+                      type: boolean
           responses:
             200:
               description: Database import result
@@ -888,7 +888,7 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
                           type: string
                         preferred:
                           description: Is the database preferred?
-                          type: bool
+                          type: boolean
                         sqlalchemy_uri_placeholder:
                           description: Example placeholder for the SQLAlchemy URI
                           type: string
diff --git a/superset/datasets/api.py b/superset/datasets/api.py
index c35a0333cb..278fc0b3ab 100644
--- a/superset/datasets/api.py
+++ b/superset/datasets/api.py
@@ -267,7 +267,7 @@ class DatasetRestApi(BaseSupersetModelRestApi):
             name: pk
           - in: query
             schema:
-              type: bool
+              type: boolean
             name: override_columns
           requestBody:
             description: Dataset schema
@@ -681,7 +681,7 @@ class DatasetRestApi(BaseSupersetModelRestApi):
                       type: string
                     overwrite:
                       description: overwrite existing datasets?
-                      type: bool
+                      type: boolean
           responses:
             200:
               description: Dataset import result
diff --git a/superset/queries/saved_queries/api.py b/superset/queries/saved_queries/api.py
index aef2288422..ee39f0913c 100644
--- a/superset/queries/saved_queries/api.py
+++ b/superset/queries/saved_queries/api.py
@@ -289,7 +289,7 @@ class SavedQueryRestApi(BaseSupersetModelRestApi):
                       type: string
                     overwrite:
                       description: overwrite existing saved queries?
-                      type: bool
+                      type: boolean
           responses:
             200:
               description: Saved Query import result