diff --git a/fileformats/medimage/contents/__init__.py b/fileformats/medimage/contents/__init__.py
index 3a265c1..080a6df 100644
--- a/fileformats/medimage/contents/__init__.py
+++ b/fileformats/medimage/contents/__init__.py
@@ -1,5 +1,5 @@
-from fileformats.core import ClassifierCategory
+from fileformats.core import Classifier
 
 
-class ContentsClassifier(ClassifierCategory):
+class ContentsClassifier(Classifier):
     pass