diff --git a/bu_isciii/new_service.py b/bu_isciii/new_service.py
index 4e4f0906..afc8d4b1 100755
--- a/bu_isciii/new_service.py
+++ b/bu_isciii/new_service.py
@@ -92,7 +92,9 @@ def __init__(
     def check_md5(self):
         # Path to the .md5 file
         project_name = self.service_samples[0]["project_name"]
-        md5_file_path = f'{self.conf["fastq_repo"]}/{project_name}/md5sum_{project_name}.md5'
+        md5_file_path = (
+            f'{self.conf["fastq_repo"]}/{project_name}/md5sum_{project_name}.md5'
+        )
         if not os.path.exists(md5_file_path):
             stderr.print(f"[red]ERROR: .md5 file not found at {md5_file_path}")
             sys.exit(1)
@@ -103,16 +105,17 @@ def check_md5(self):
 
         # Regex pattern to match sample names in .fastq.gz files
         sample_names_pattern = "|".join(
-        [f"{sample['sample_name']}.*\\.fastq\\.gz" for sample in self.service_samples]
-    )
+            [
+                f"{sample['sample_name']}.*\\.fastq\\.gz"
+                for sample in self.service_samples
+            ]
+        )
 
         # md5sum command
         stderr.print(f"[blue]Checking MD5 integrity for {md5_file_path}")
         try:
             cmd = f"grep -E '{sample_names_pattern}' {md5_file_path} | md5sum -c"
-            subprocess.run(
-                cmd, shell=True, check=True, executable='/bin/bash'
-            )
+            subprocess.run(cmd, shell=True, check=True, executable="/bin/bash")
             stderr.print("[green]MD5 check passed!")
         except subprocess.CalledProcessError as e:
             stderr.print(f"[red]ERROR: MD5 check failed: {e.stderr}")