diff --git a/sloth/conf/default_config.py b/sloth/conf/default_config.py
index 08cc505..4b891fe 100644
--- a/sloth/conf/default_config.py
+++ b/sloth/conf/default_config.py
@@ -21,8 +21,8 @@ INSERTERS = {
 }
 
 CONTAINERS = (
-    ('*.json',   'sloth.annotations.container.JSONContainer'),
-    ('*.yaml',   'sloth.annotations.container.YAMLContainer'),
+    ('*.json',   'sloth.annotations.container.JsonContainer'),
+    ('*.yaml',   'sloth.annotations.container.YamlContainer'),
     ('*.pickle', 'sloth.annotations.container.PickleContainer'),
 )