diff --git a/plugins/3MFWriter/ThreeMFWorkspaceWriter.py b/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
index f07a37a25f..825259ad58 100644
--- a/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
+++ b/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
@@ -97,7 +97,7 @@ class ThreeMFWorkspaceWriter(WorkspaceWriter):
         file_in_archive.compress_type = zipfile.ZIP_DEFLATED
 
         # Do not include the network authentication keys
-        ignore_keys = {"network_authentication_id", "network_authentication_key"}
+        ignore_keys = {"network_authentication_id", "network_authentication_key", "octoprint_api_key"}
         serialized_data = container.serialize(ignored_metadata_keys = ignore_keys)
 
         archive.writestr(file_in_archive, serialized_data)