diff --git a/pvconsumer/app.py b/pvconsumer/app.py
index 44f2575..11d3d9b 100644
--- a/pvconsumer/app.py
+++ b/pvconsumer/app.py
@@ -54,7 +54,7 @@
     type=click.STRING,
 )
 def app(
-    db_url: Optional[str] = None,
+    db_url: str,
     filename: Optional[str] = None,
     provider: str = "pvoutput.org",
 ):