diff --git a/README.md b/README.md
index 94be5b33..c528f09d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # About
 
-Calibre-Web is a web app providing a clean interface for browsing, reading and downloading eBooks using an existing [Calibre](https://calibre-ebook.com) database.
+Calibre-Web is a web app providing a clean interface for browsing, reading and downloading eBooks using a valid [Calibre](https://calibre-ebook.com) database.
 
 [![GitHub License](https://img.shields.io/github/license/janeczku/calibre-web?style=flat-square)](https://github.com/janeczku/calibre-web/blob/master/LICENSE)
 [![GitHub commit activity](https://img.shields.io/github/commit-activity/w/janeczku/calibre-web?logo=github&style=flat-square&label=commits)]()
diff --git a/cps/db.py b/cps/db.py
index 3f64fbb5..d2977e07 100644
--- a/cps/db.py
+++ b/cps/db.py
@@ -592,6 +592,7 @@ class CalibreDB:
                 cls.setup_db_cc_classes(cc)
             except OperationalError as e:
                 log.error_or_exception(e)
+                return False
 
         cls.session_factory = scoped_session(sessionmaker(autocommit=False,
                                                           autoflush=True,