diff --git a/backend/modules/brain/entity/integration_brain.py b/backend/modules/brain/entity/integration_brain.py
index a1df9b9f6..0af7e2a0b 100644
--- a/backend/modules/brain/entity/integration_brain.py
+++ b/backend/modules/brain/entity/integration_brain.py
@@ -8,6 +8,7 @@ from pydantic import BaseModel
 class IntegrationType(str, Enum):
     CUSTOM = "custom"
     SYNC = "sync"
+    DOC = "doc"
 
 
 class IntegrationDescriptionEntity(BaseModel):
diff --git a/backend/modules/chat/controller/chat/brainful_chat.py b/backend/modules/chat/controller/chat/brainful_chat.py
index 70c0b3b3c..d35608ea7 100644
--- a/backend/modules/chat/controller/chat/brainful_chat.py
+++ b/backend/modules/chat/controller/chat/brainful_chat.py
@@ -40,6 +40,7 @@ integration_list = {
     "gpt4": GPT4Brain,
     "sql": SQLBrain,
     "big": BigBrain,
+    "doc": KnowledgeBrainQA,
 }
 
 brain_service = BrainService()
diff --git a/supabase/migrations/20240304223646_integrations-all.sql b/supabase/migrations/20240304223646_integrations-all.sql
new file mode 100644
index 000000000..872fce44c
--- /dev/null
+++ b/supabase/migrations/20240304223646_integrations-all.sql
@@ -0,0 +1,13 @@
+alter table "public"."integrations" alter column "integration_type" drop default;
+
+alter type "public"."integration_type" rename to "integration_type__old_version_to_be_dropped";
+
+create type "public"."integration_type" as enum ('custom', 'sync', 'doc');
+
+alter table "public"."integrations" alter column integration_type type "public"."integration_type" using integration_type::text::"public"."integration_type";
+
+alter table "public"."integrations" alter column "integration_type" set default 'custom'::integration_type;
+
+drop type "public"."integration_type__old_version_to_be_dropped";
+
+