diff --git a/config.py b/config.py
index fd26dd004..03f58bb4f 100644
--- a/config.py
+++ b/config.py
@@ -79,6 +79,7 @@ class DebugConfig(FlaskConfig, MailConfig, LocalStorage, SQLiteDB,
     'level': logging.DEBUG,
     'format': LOG_FORMAT
   }
+  SEND_FILE_MAX_AGE_DEFAULT = 0
 
 
 class LocalHostedConfig(FlaskConfig, MailConfig, S3Storage, RDSMySQL,
@@ -88,6 +89,7 @@ class LocalHostedConfig(FlaskConfig, MailConfig, S3Storage, RDSMySQL,
     'level': logging.DEBUG,
     'format': LOG_FORMAT
   }
+  SEND_FILE_MAX_AGE_DEFAULT = 0
 
 
 class ProductionConfig(FlaskConfig, MailConfig, S3Storage, RDSMySQL,
@@ -99,3 +101,4 @@ class ProductionConfig(FlaskConfig, MailConfig, S3Storage, RDSMySQL,
     'format': LOG_FORMAT,
     'filename': 'application.log',
   }
+  SEND_FILE_MAX_AGE_DEFAULT = 0