diff --git a/mangareader.py b/mangareader.py
index d61039e..c5c6af5 100755
--- a/mangareader.py
+++ b/mangareader.py
@@ -11,6 +11,7 @@ def send_from_cwd(filename):
 
 
 app = Flask(__name__, static_folder='frontend/dist/static', template_folder='frontend/dist')
+app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 604800  # 1 week
 CORS(app)
 
 db = CalibreDB()