Enable persistent block list by default
diff --git a/aardvark.yaml b/aardvark.yaml
index 991fd49..99864cc 100644
--- a/aardvark.yaml
+++ b/aardvark.yaml
@@ -13,6 +13,8 @@
 # Debug prints for ...debug. disabled by default
 debug: false
 
+# Enable persistent storage of offenders
+persistence: true
 
 ##############################
 # The actual spam scan rules #