diff --git a/schema_clusters.json b/schema_clusters.json
index 9ffca60..8928ea7 100644
--- a/schema_clusters.json
+++ b/schema_clusters.json
@@ -141,7 +141,7 @@
                 }
               },
               "NACE_CODE": {
-                "type": "string"
+                "type": "array"
               }
             }
           }