diff --git a/paperwork/models.py b/paperwork/models.py
index 6556590..0c337cb 100644
--- a/paperwork/models.py
+++ b/paperwork/models.py
@@ -138,7 +138,14 @@ class CertificationVersion(models.Model):
                 name="unique_certification_version",
             )
         ]
-        ordering = ("major", "minor", "patch", "prerelease", "approval_date")
+        ordering = (
+            "definition",
+            "major",
+            "minor",
+            "patch",
+            "prerelease",
+            "approval_date",
+        )
         get_latest_by = ("major", "minor", "patch", "prerelease", "approval_date")
         base_manager_name = "objects"