diff --git a/allauth/headless/app_settings.py b/allauth/headless/app_settings.py
index dd8e2932c1..18f9ba657d 100644
--- a/allauth/headless/app_settings.py
+++ b/allauth/headless/app_settings.py
@@ -32,7 +32,9 @@ def SERVE_SPECIFICATION(self) -> bool:
 
     @property
     def SPECIFICATION_TEMPLATE_NAME(self) -> Optional[str]:
-        return "headless/spec/redoc_cdn.html"
+        return self._setting(
+            "SPECIFICATION_TEMPLATE_NAME", "headless/spec/redoc_cdn.html"
+        )
 
     @property
     def CLIENTS(self) -> Tuple[str]: