diff --git a/src/store/id_store.rs b/src/store/id_store.rs
index 0c07cf4..15a0bed 100644
--- a/src/store/id_store.rs
+++ b/src/store/id_store.rs
@@ -66,7 +66,7 @@ impl<T: Persistence> IDStore<T> {
             .await
     }
 
-    async fn persist_mapping(&mut self) {
+    pub async fn persist_mapping(&mut self) {
         self.persistence_layer.save_mapping(&self.mapping).await
     }
 
diff --git a/src/webserver/api.rs b/src/webserver/api.rs
index 7be6138..66e93ef 100644
--- a/src/webserver/api.rs
+++ b/src/webserver/api.rs
@@ -42,6 +42,7 @@ pub async fn add_mapping(
 ) -> impl IntoResponse {
     let mut store = state.store.lock().await;
     store.mapping.add_mapping(data.id, data.name);
+    store.persist_mapping().await;
 }
 
 // SSE /api/idevent