diff --git a/entity_validator.py b/entity_validator.py
index 3c5b66d..fbcd49e 100644
--- a/entity_validator.py
+++ b/entity_validator.py
@@ -79,13 +79,16 @@ def validate(entity):
 
     schema = {
         'finanzdaten': {
-            'type': 'dict', 
+            'type': 'dict',
+            'required': True,
             'schema': schema_fin},
         'mitgliederdaten': {
-            'type': 'dict', 
+            'type': 'dict',
+            'required': True,
             'schema': schema_membership},
         'stammdaten': {
-            'type': 'dict', 
+            'type': 'dict',
+            'required': True,
             'schema': schema_base},
         'id': {
             'type': 'string',