diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index cc3441b..2cc8cf6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.4.0
+  rev: v6.0.0
   hooks:
   - id: trailing-whitespace
   - id: check-yaml
@@ -13,7 +13,7 @@ repos:
   - id: jupyter-notebook-cleanup
     args:
     - --remove-kernel-metadata
-- repo: https://github.com/psf/black
-  rev: 22.12.0
+- repo: https://github.com/psf/black-pre-commit-mirror
+  rev: 26.3.1
   hooks:
   - id: black
\ No newline at end of file
diff --git a/scripts/process_data.py b/scripts/process_data.py
index b4a82a1..433d8a9 100644
--- a/scripts/process_data.py
+++ b/scripts/process_data.py
@@ -172,13 +172,15 @@ def buses_from_lines(lines, geocode=True):
         lambda s: re.sub(r"([a-z])([A-Z])", r"\1 \2", s) if isinstance(s, str) else s
     )
     buses["name"] = buses.name.apply(
-        lambda s: s.replace("ue", "ü")
-        .replace("ae", "ä")
-        .replace("oe", "ö")
-        .replace("Itzehö", "Itzehoe")
-        .replace("Daürsberg", "Dauersberg")
-        if isinstance(s, str) and s[-2:] in ["DE", "AT"]
-        else s
+        lambda s: (
+            s.replace("ue", "ü")
+            .replace("ae", "ä")
+            .replace("oe", "ö")
+            .replace("Itzehö", "Itzehoe")
+            .replace("Daürsberg", "Dauersberg")
+            if isinstance(s, str) and s[-2:] in ["DE", "AT"]
+            else s
+        )
     )
     if geocode:
         buses = pd.concat([buses, buses.name.apply(locate)], axis=1)