diff --git a/backend/infrahub/core/constants/__init__.py b/backend/infrahub/core/constants/__init__.py
index f42a537d77..c674c118c2 100644
--- a/backend/infrahub/core/constants/__init__.py
+++ b/backend/infrahub/core/constants/__init__.py
@@ -120,7 +120,12 @@ class AllowOverrideType(InfrahubStringEnum):
 
 class ContentType(InfrahubStringEnum):
     APPLICATION_JSON = "application/json"
+    APPLICATION_YAML = "application/yaml"
+    APPLICATION_XML = "application/xml"
     TEXT_PLAIN = "text/plain"
+    TEXT_MARKDOWN = "text/markdown"
+    TEXT_CSV = "text/csv"
+    IMAGE_SVG = "image/svg+xml"
 
 
 class CheckType(InfrahubStringEnum):