diff --git a/notebooks/Gotthard2/Characterize_Darks_Gotthard2_NBC.ipynb b/notebooks/Gotthard2/Characterize_Darks_Gotthard2_NBC.ipynb
index 74bc37e13706bb269205fb596037f53b02618e46..fda112e5d0e08a1edafe0023adab63a805b8f710 100644
--- a/notebooks/Gotthard2/Characterize_Darks_Gotthard2_NBC.ipynb
+++ b/notebooks/Gotthard2/Characterize_Darks_Gotthard2_NBC.ipynb
@@ -128,7 +128,7 @@
     "run_dc = RunDirectory(in_folder / f\"r{run_high:04d}\")\n",
     "file_loc = f\"proposal:{run_dc.run_metadata()['proposalNumber']} runs:{run_high} {run_med} {run_low}\"  # noqa\n",
     "\n",
-    "receivers = list(run_dc.select(f'{karabo_id}/DET/{receiver_template}*').all_sources)"
+    "receivers = sorted(list(run_dc.select(f'{karabo_id}/DET/{receiver_template}*').all_sources))"
    ]
   },
   {