diff --git a/prisma/migrations/20210918183212_removed_default_value_of_data_source/migration.sql b/prisma/migrations/20210918183212_removed_default_value_of_data_source/migration.sql
new file mode 100644
index 000000000..3fa6e2942
--- /dev/null
+++ b/prisma/migrations/20210918183212_removed_default_value_of_data_source/migration.sql
@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "MarketData" ALTER COLUMN "dataSource" DROP DEFAULT;
+
+-- AlterTable
+ALTER TABLE "Order" ALTER COLUMN "dataSource" DROP DEFAULT;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 8cff7862c..10f27e8ef 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -62,7 +62,7 @@ model AuthDevice {
 
 model MarketData {
   createdAt   DateTime   @default(now())
-  dataSource  DataSource @default(YAHOO)
+  dataSource  DataSource
   date        DateTime
   id          String     @default(uuid())
   symbol      String
@@ -78,7 +78,7 @@ model Order {
   accountUserId   String?
   createdAt       DateTime       @default(now())
   currency        Currency?
-  dataSource      DataSource     @default(YAHOO)
+  dataSource      DataSource
   date            DateTime
   fee             Float
   id              String         @default(uuid())