diff --git a/db/migrate/20250110114305_embedding_config_data_migration.rb b/db/migrate/20250110114305_embedding_config_data_migration.rb
index 3125bc99..98fc3864 100644
--- a/db/migrate/20250110114305_embedding_config_data_migration.rb
+++ b/db/migrate/20250110114305_embedding_config_data_migration.rb
@@ -185,7 +185,7 @@ class EmbeddingConfigDataMigration < ActiveRecord::Migration[7.0]
       tokenizer_class: attrs[:tokenizer_class],
       url: attrs[:url],
       api_key: attrs[:api_key],
-      provider_params: attrs[:provider_params],
+      provider_params: attrs[:provider_params]&.to_json,
       seeded: !!attrs[:seeded],
       now: Time.zone.now,
     )