diff --git a/config.toml b/config.toml
index c9e5c75..5711219 100644
--- a/config.toml
+++ b/config.toml
@@ -24,11 +24,11 @@ post = "/:year/:month/:slug/"
 posts = "/:year/:month/:slug/"
 
 [mediaTypes]
-  [mediaTypes."application/atom"]
+  [mediaTypes."application/xml+atom"]
   suffixes = ["xml"]
 
 [outputFormats.Atom]
-mediaType = "application/atom"
+mediaType = "application/xml+atom"
 baseName = "index"
 isPlainText = true