diff --git a/src/pyflask/manageNeuroconv/manage_neuroconv.py b/src/pyflask/manageNeuroconv/manage_neuroconv.py
index 22bceede3..9d10d1d55 100644
--- a/src/pyflask/manageNeuroconv/manage_neuroconv.py
+++ b/src/pyflask/manageNeuroconv/manage_neuroconv.py
@@ -14,7 +14,7 @@
 
 from tqdm_publisher import TQDMProgressHandler
 
-from .info import CONVERSION_SAVE_FOLDER_PATH, GUIDE_ROOT_FOLDER, STUB_SAVE_FOLDER_PATH
+from .info import CONVERSION_SAVE_FOLDER_PATH, GUIDE_ROOT_FOLDER, STUB_SAVE_FOLDER_PATH, is_packaged, resource_path
 from .info.sse import format_sse
 
 progress_handler = TQDMProgressHandler()
@@ -1000,6 +1000,13 @@ def update_conversion_progress(message):
                 tzinfo=zoneinfo.ZoneInfo(info["timezone"])
             )
 
+        # Add GUIDE watermark
+        package_json_file_path = resource_path("package.json" if is_packaged() else "../../package.json")
+        with open(file=package_json_file_path) as fp:
+            package_json = json.load(fp=fp)
+        app_version = package_json["version"]
+        resolved_metadata["NWBFile"]["source_script"] = f"Created using NWB GUIDE v{app_version}"
+        
         # Actually run the conversion
         converter.run_conversion(
             metadata=resolved_metadata,