diff --git a/README.md b/README.md
index e0d0c19..8059ad3 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ The model is developed in two phases:
 
 ## Data
 
-Input: parquet files produced by [miniCaloSim](../minicalosim), or converted from a ROOT file via `scripts/steps_to_parquet.py`. Each row is one Geant4 step. Train/val split is by `event_id` (not row shuffle) to avoid leaking correlated steps from the same shower.
+Input: parquet files produced by [miniCaloSim](https://gitlab.etp.kit.edu/lbogner/minicalosim), or converted from a ROOT file via `scripts/steps_to_parquet.py`. Each row is one Geant4 step. Train/val split is by `event_id` (not row shuffle) to avoid leaking correlated steps from the same shower.
 
 ## Project structure