diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 57a88091..a54258d0 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,7 +14,7 @@ repos:
 # Run ruff to lint and format
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.8.6
+  rev: v0.9.1
   hooks:
     # Run the linter.
   - id: ruff
diff --git a/latex_tables/tables_in_latex.py b/latex_tables/tables_in_latex.py
index 8b1929d7..ae100399 100644
--- a/latex_tables/tables_in_latex.py
+++ b/latex_tables/tables_in_latex.py
@@ -298,7 +298,7 @@
         "biomass CHP",
         "battery storage",
         "home battery storage",
-        "central coal CHP" "hydrogen storage underground",
+        "central coal CHPhydrogen storage underground",
         "hydrogen storage tank type 1",
         "central water tank storage",
         "decentral water tank storage",
diff --git a/scripts/_helpers.py b/scripts/_helpers.py
index 9772ca2d..4420797a 100644
--- a/scripts/_helpers.py
+++ b/scripts/_helpers.py
@@ -19,7 +19,7 @@ def __setattr__(self, name, value):
         Setattr is called when the syntax a.b = 2 is used to set a value.
         """
         if hasattr(Dict, name):
-            raise AttributeError("'Dict' object attribute " f"'{name}' is read-only")
+            raise AttributeError(f"'Dict' object attribute '{name}' is read-only")
         self[name] = value
 
     def __getattr__(self, item):