diff --git a/trs_cli/client.py b/trs_cli/client.py
index 84fc8bd..720c6b7 100644
--- a/trs_cli/client.py
+++ b/trs_cli/client.py
@@ -531,6 +531,7 @@ def delete_version(
         response = self._send_request_and_validate_response(
             url=url,
             method='delete',
+            validation_class_ok=str,
         )
         logger.info(
             "Deleted tool version"