diff --git a/rest_framework/management/commands/generateschema.py b/rest_framework/management/commands/generateschema.py
index 04a4267c7..94b110aa1 100644
--- a/rest_framework/management/commands/generateschema.py
+++ b/rest_framework/management/commands/generateschema.py
@@ -29,9 +29,8 @@ class Command(BaseCommand):
         schema = generator.get_schema(request=None, public=True)
 
         renderer = self.get_renderer(options['format'])
-        output = renderer.render(schema)
-
-        self.stdout.write(output)
+        output = renderer.render(schema, renderer_context={})
+        self.stdout.write(output.decode('utf-8'))
 
     def get_renderer(self, format):
         return {
diff --git a/rest_framework/renderers.py b/rest_framework/renderers.py
index 8fa3c5576..375c38a85 100644
--- a/rest_framework/renderers.py
+++ b/rest_framework/renderers.py
@@ -1034,7 +1034,7 @@ class OpenAPIRenderer(_BaseOpenAPIRenderer):
 
     def render(self, data, media_type=None, renderer_context=None):
         structure = self.get_structure(data)
-        return yaml.dump(structure, default_flow_style=False)
+        return yaml.dump(structure, default_flow_style=False).encode('utf-8')
 
 
 class JSONOpenAPIRenderer(_BaseOpenAPIRenderer):
@@ -1047,4 +1047,4 @@ class JSONOpenAPIRenderer(_BaseOpenAPIRenderer):
 
     def render(self, data, media_type=None, renderer_context=None):
         structure = self.get_structure(data)
-        return json.dumps(structure, indent=4)
+        return json.dumps(structure, indent=4).encode('utf-8')