diff --git a/nerdd_backend/models/job.py b/nerdd_backend/models/job.py
index 2507193..75c6a6e 100644
--- a/nerdd_backend/models/job.py
+++ b/nerdd_backend/models/job.py
@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Any, Dict, List, Optional
 
 from pydantic import BaseModel
@@ -16,7 +16,7 @@ class Job(BaseModel):
     job_type: str
     source_id: str
     params: dict
-    created_at: datetime = datetime.now()
+    created_at: datetime = datetime.now(timezone.utc)
     status: str
     num_entries_total: Optional[int] = None
 
diff --git a/nerdd_backend/models/source.py b/nerdd_backend/models/source.py
index 30ad5d4..3e26f8a 100644
--- a/nerdd_backend/models/source.py
+++ b/nerdd_backend/models/source.py
@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Optional
 
 from pydantic import BaseModel
@@ -11,7 +11,7 @@ class Source(BaseModel):
     format: Optional[str] = None
     # the filename that was provided by the user
     filename: Optional[str] = None
-    created_at: datetime = datetime.now()
+    created_at: datetime = datetime.now(timezone.utc)
 
 
 class SourcePublic(Source):