diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 96fededb..a700ac19 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -41,7 +41,7 @@ repos:
         args:
           - --ignore-case
   - repo: https://github.com/astral-sh/uv-pre-commit
-    rev: 0.8.22
+    rev: 0.9.8
     hooks:
       # Keep lock file up to date
       - id: uv-lock
@@ -64,7 +64,7 @@ repos:
       - id: forbid-tabs
         exclude: documentation/make.bat|documentation/Makefile
   - repo: https://github.com/streetsidesoftware/cspell-cli
-    rev: v9.2.0
+    rev: v9.2.1
     hooks:
       # Run a spellcheck (words pulled from cspell.config.yaml)
       - id: cspell
@@ -92,7 +92,7 @@ repos:
       # Enforce that type annotations are used instead of type comments
       - id: python-use-type-annotations
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.13.2
+    rev: v0.14.4
     hooks:
       # Run the linter.
       - id: ruff
diff --git a/documentation/source/conf.py b/documentation/source/conf.py
index b4edece7..e0fcda9d 100644
--- a/documentation/source/conf.py
+++ b/documentation/source/conf.py
@@ -54,7 +54,6 @@
 from ref_style import STYLE_NAME  # needed to fix citations within the docstrings
 
 import coreax  # Cannot import until after package has been added to path
-import coreax.util
 
 # pylint: enable=wrong-import-position
 
@@ -98,6 +97,7 @@
 
 
 # pylint: disable=invalid-name
+always_use_bars_union = True
 toc_object_entries_show_parents = "hide"  # don't show prefix in secondary TOC
 # pylint: enable=invalid-name