diff --git a/book/_toc.yml b/book/_toc.yml
index cdb663a..44ec3b2 100644
--- a/book/_toc.yml
+++ b/book/_toc.yml
@@ -7,7 +7,7 @@ parts:
     - file: thesis_projects/overview_thesis_projects.md
       sections:
       - file: thesis_projects/BSc/2023_Q4_GeltSteiger_CEG/intro_BSc_GeltSteiger.md
-      - file: thesis_projects/BSc/2023_Q4_GeltSteiger_CEG/methods_BSc_GeltSteiger.ipynb
+          - file: thesis_projects/BSc/2023_Q4_GeltSteiger_CEG/methods_BSc_GeltSteiger.ipynb
     - file: tutorials_examples/intro_tutorials_examples.md
       sections:
       - file: tutorials_examples/1_HBV_Caravan_ERA5/example_model_run_HBV.ipynb