diff --git a/lib/AbstractApiModule.js b/lib/AbstractApiModule.js
index abede0bf..cf7b974e 100644
--- a/lib/AbstractApiModule.js
+++ b/lib/AbstractApiModule.js
@@ -327,11 +327,9 @@ class AbstractApiModule extends AbstractModule {
    * @return {Promise} Resolves with the sanitised data
    */
   async sanitise (schemaName, data, options) {
+    const schema = await this.getSchema(schemaName, data)
     const isArray = Array.isArray(data)
-    const sanitised = await Promise.all((isArray ? data : [data]).map(async d => {
-      const schema = await this.getSchema(schemaName, d)
-      return schema.sanitise(d, options)
-    }))
+    const sanitised = (isArray ? data : [data]).map(d => schema.sanitise(d, options))
     return isArray ? sanitised : sanitised[0]
   }