diff --git a/src/versia/objects.rs b/src/versia/objects.rs
index 80831a5..3135a84 100644
--- a/src/versia/objects.rs
+++ b/src/versia/objects.rs
@@ -36,6 +36,7 @@ fn sort_alphabetically<T: Serialize, S: serde::Serializer>(
 pub struct SortAlphabetically<T: Serialize>(#[serde(serialize_with = "sort_alphabetically")] pub T);
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(rename_all = "lowercase")]
 pub enum CategoryType {
     Microblog,
     Forum,