diff --git a/src/osa/scripts/calibration_pipeline.py b/src/osa/scripts/calibration_pipeline.py
index c18508a0..893f7eab 100644
--- a/src/osa/scripts/calibration_pipeline.py
+++ b/src/osa/scripts/calibration_pipeline.py
@@ -47,20 +47,19 @@ def drs4_pedestal_command(drs4_pedestal_run_id: int) -> list:
     command = cfg.get("lstchain", "drs4_baseline")
     return [
         command,
-        "-r", drs4_pedestal_run_id,
+        "-r", str(drs4_pedestal_run_id),
         "-b", base_dir,
         "--no-progress",
     ]
 
-
 def calibration_file_command(drs4_pedestal_run_id: int, pedcal_run_id: int) -> list:
     """Build the create_calibration_file command."""
     base_dir = Path(cfg.get("LST1", "BASE")).resolve()
     command = cfg.get("lstchain", "charge_calibration")
     cmd = [
         command,
-        "-p", drs4_pedestal_run_id,
-        "-r", pedcal_run_id,
+        "-p", str(drs4_pedestal_run_id),
+        "-r", str(pedcal_run_id),
         "-b", base_dir,
     ]
     # In case of problems with trigger tagging: