diff --git a/core/lib/rules.py b/core/lib/rules.py
index 0c81a6f..6fb9309 100644
--- a/core/lib/rules.py
+++ b/core/lib/rules.py
@@ -401,7 +401,7 @@ class NotificationRuleData(object):
         else:
             # Get the default value for the user if not present
             index = parse_index(self.user, {}, raise_error=True)
-            self.parsed["index"] = index
+            self.parsed["index"] = [index]
 
         if "source" in self.parsed:
             source = self.parsed["source"]
@@ -413,7 +413,7 @@ class NotificationRuleData(object):
         else:
             # Get the default value for the user if not present
             source = parse_source(self.user, {}, raise_error=True)
-            self.parsed["source"] = source
+            self.parsed["source"] = [source]
 
     def parse_data(self):
         """