diff --git a/nextflow_schema.json b/nextflow_schema.json
index fe77913..78635a7 100644
--- a/nextflow_schema.json
+++ b/nextflow_schema.json
@@ -438,6 +438,10 @@
         },
         "run_krona": {
             "type": "boolean"
+        },
+        "krona_taxonomy_directory": {
+            "type": "string",
+            "default": null
         }
     }
 }