diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 616a517..a255dab 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,7 +24,7 @@ repos:
       - id: check-ast
 
   - repo: https://github.com/PyCQA/docformatter
-    rev: v1.7.7
+    rev: v1.7.8
     hooks:
       - id: docformatter
         args:
@@ -42,7 +42,7 @@ repos:
       - id: rst-directive-colons
 
   - repo: https://github.com/PyCQA/isort
-    rev: 8.0.1
+    rev: 9.0.0a3
     hooks:
       - id: isort
 
@@ -81,7 +81,7 @@ repos:
       - id: nbstripout
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.15.9"
+    rev: "v0.15.20"
     hooks:
       - id: ruff
         types_or: [ python, pyi, jupyter ]
diff --git a/src/phasespace/phasespace.py b/src/phasespace/phasespace.py
index a01fcae..7bf3df8 100644
--- a/src/phasespace/phasespace.py
+++ b/src/phasespace/phasespace.py
@@ -185,7 +185,7 @@ def get_mass(
 
     @property
     def has_fixed_mass(self):
-        """bool: Is the mass a callable function?"""
+        """Bool: Is the mass a callable function?"""
         return not callable(self._mass)
 
     def set_children(self, *children):
@@ -222,12 +222,12 @@ def set_children(self, *children):
 
     @property
     def has_children(self):
-        """bool: Does the particle have children?"""
+        """Bool: Does the particle have children?"""
         return bool(self.children)
 
     @property
     def has_grandchildren(self):
-        """bool: Does the particle have grandchildren?"""
+        """Bool: Does the particle have grandchildren?"""
         if not self.children:
             return False
         return any(child.has_children for child in self.children)
@@ -754,7 +754,6 @@ def generate_tensor(
             ValueError: If ``n_events`` and the size of ``boost_to`` don't match.
             See ``GenParticle.generate_unnormalized``.
         """
-
         # Run generation
         raise RuntimeError(
             "This function is removed. Use `generate` which does not return a Tensor as well."