diff --git a/rendercv/templates/classic/__init__.py b/rendercv/templates/classic/__init__.py
index 2e463e1..6d517b8 100644
--- a/rendercv/templates/classic/__init__.py
+++ b/rendercv/templates/classic/__init__.py
@@ -1,5 +1,7 @@
+from typing import Literal
+
 import pydantic
 
 
 class ClassicThemeOptions(pydantic.BaseModel):
-    pass
+    theme: Literal["classic"]