diff --git a/ai_ta_backend/service/export_service.py b/ai_ta_backend/service/export_service.py
index 79bf9d74..61469ec4 100644
--- a/ai_ta_backend/service/export_service.py
+++ b/ai_ta_backend/service/export_service.py
@@ -18,7 +18,7 @@
 class ExportService:
 
   @inject
-  def __init__(self, sql: SQLDatabase, s3: AWSStorage, sentry=SentryService):
+  def __init__(self, sql: SQLDatabase, s3: AWSStorage, sentry: SentryService):
     self.sql = sql
     self.s3 = s3
     self.sentry = sentry