diff --git a/app/models/__init__.py b/app/models/__init__.py
index 4c70c2e..784b65e 100644
--- a/app/models/__init__.py
+++ b/app/models/__init__.py
@@ -52,7 +52,7 @@ class AbstractResource(db.Model):
     @classmethod
     def csv_header(cls):
         return [
-            "id", "added", "updated", "deprecated", "destroyed"
+            "id", "added", "updated", "deprecated", "deprecation_reason", "destroyed"
         ]
 
     def csv_row(self):