diff --git a/src/api/core/ciphers.rs b/src/api/core/ciphers.rs
index 13bf701f..da718942 100644
--- a/src/api/core/ciphers.rs
+++ b/src/api/core/ciphers.rs
@@ -703,6 +703,7 @@ async fn put_cipher_partial(
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct CollectionsAdminData {
+    #[serde(alias = "CollectionIds")]
     collection_ids: Vec<String>,
 }