diff --git a/src/xfel_calibrate/finalize.py b/src/xfel_calibrate/finalize.py
index a6d0eeb252c9d2513374bb43c63972062522929d..88f264af0f2faba410a2a34ca54461e3e0e8afe7 100644
--- a/src/xfel_calibrate/finalize.py
+++ b/src/xfel_calibrate/finalize.py
@@ -441,7 +441,7 @@ def finalize(joblist, finaljob, run_path, out_path, version, title, author, repo
         slurm_archive_dir = Path(out_path) / f"slurm_out_{run_path.name}"
 
     print(f"Moving temporary files to final location: {slurm_archive_dir}")
-    move(run_path, slurm_archive_dir)
+    move(str(run_path), str(slurm_archive_dir))  # Needs str until Python 3.9
 
     md_path = slurm_archive_dir / "calibration_metadata.yml"
     # Notebooks should have a karabo_id parameter, which we'll use to make a