diff --git a/stix2/other.py b/stix2/other.py
index 2dfb804..83d42cf 100644
--- a/stix2/other.py
+++ b/stix2/other.py
@@ -108,29 +108,29 @@ class MarkingDefinition(_STIXBase):
 
 
 TLP_WHITE = MarkingDefinition(
-                id="marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9",
-                created="2017-01-20T00:00:00.000Z",
-                definition_type="tlp",
-                definition=TLPMarking(tlp="white")
+    id="marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9",
+    created="2017-01-20T00:00:00.000Z",
+    definition_type="tlp",
+    definition=TLPMarking(tlp="white")
 )
 
 TLP_GREEN = MarkingDefinition(
-                id="marking-definition--34098fce-860f-48ae-8e50-ebd3cc5e41da",
-                created="2017-01-20T00:00:00.000Z",
-                definition_type="tlp",
-                definition=TLPMarking(tlp="green")
+    id="marking-definition--34098fce-860f-48ae-8e50-ebd3cc5e41da",
+    created="2017-01-20T00:00:00.000Z",
+    definition_type="tlp",
+    definition=TLPMarking(tlp="green")
 )
 
 TLP_AMBER = MarkingDefinition(
-                id="marking-definition--f88d31f6-486f-44da-b317-01333bde0b82",
-                created="2017-01-20T00:00:00.000Z",
-                definition_type="tlp",
-                definition=TLPMarking(tlp="amber")
+    id="marking-definition--f88d31f6-486f-44da-b317-01333bde0b82",
+    created="2017-01-20T00:00:00.000Z",
+    definition_type="tlp",
+    definition=TLPMarking(tlp="amber")
 )
 
 TLP_RED = MarkingDefinition(
-                id="marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed",
-                created="2017-01-20T00:00:00.000Z",
-                definition_type="tlp",
-                definition=TLPMarking(tlp="red")
+    id="marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed",
+    created="2017-01-20T00:00:00.000Z",
+    definition_type="tlp",
+    definition=TLPMarking(tlp="red")
 )