diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f189a945..c424bcf7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -21,7 +21,7 @@ repos:
       - id: check-toml
       - id: check-added-large-files
   - repo: https://github.com/psf/black
-    rev: 26.3.1
+    rev: 26.5.1
     hooks:
       - id: black
   - repo: https://github.com/pycqa/flake8
@@ -29,7 +29,7 @@ repos:
     hooks:
       - id: flake8
   - repo: https://github.com/pycqa/isort
-    rev: 8.0.1
+    rev: 9.0.0a3
     hooks:
       - id: isort
         args: ["--profile", "black"]
@@ -59,7 +59,7 @@ repos:
           - "prettier@^3.2.4"
   # docformatter - PEP 257 compliant docstring formatter
   - repo: https://github.com/PyCQA/docformatter
-    rev: v1.7.7
+    rev: v1.7.8
     hooks:
       - id: docformatter
         additional_dependencies: [tomli]
diff --git a/news/dependency-update.rst b/news/dependency-update.rst
new file mode 100644
index 00000000..abd1d67a
--- /dev/null
+++ b/news/dependency-update.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* No news needed: updating docformatter, isort and black. Not user facing.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>
diff --git a/src/diffpy/__init__.py b/src/diffpy/__init__.py
index 00208e23..99124eeb 100644
--- a/src/diffpy/__init__.py
+++ b/src/diffpy/__init__.py
@@ -21,7 +21,6 @@
 Blank namespace package.
 """
 
-
 from pkgutil import extend_path
 
 __path__ = extend_path(__path__, __name__)
diff --git a/src/diffpy/utils/parsers/serialization.py b/src/diffpy/utils/parsers/serialization.py
index 5acbbe41..46e29d2e 100644
--- a/src/diffpy/utils/parsers/serialization.py
+++ b/src/diffpy/utils/parsers/serialization.py
@@ -33,9 +33,10 @@ def serialize_data(
     show_path=True,
     serial_file=None,
 ):
-    """Serialize file data into a dictionary. Can also save dictionary
-    into a serial language file. Dictionary is formatted as {filename:
-    data}.
+    """Serialize file data into a dictionary.
+
+    Can also save dictionary into a serial language file.
+    Dictionary is formatted as {filename:data}.
 
     Requires hdata and data_table (can be generated by load_data).
 
@@ -67,7 +68,6 @@ def serialize_data(
     dict:
         Returns the dictionary loaded from/into the updated database file.
     """
-
     # compile data_table and hddata together
     data = {}
 
@@ -191,7 +191,6 @@ def deserialize_data(filename, filetype=None):
     dict
         A dictionary read from a serial file.
     """
-
     # check if supported type
     f = pathlib.Path(filename)
     f_name = f.name
diff --git a/src/diffpy/utils/resampler.py b/src/diffpy/utils/resampler.py
index 354eb37d..1e0f035d 100644
--- a/src/diffpy/utils/resampler.py
+++ b/src/diffpy/utils/resampler.py
@@ -141,7 +141,6 @@ def resample(r, s, dr):
     -------
     Returns resampled ``(r, s)``.
     """
-
     warnings.warn(
         (
             "The 'resample' function is deprecated and will be removed "
diff --git a/src/diffpy/utils/wx/gridutils.py b/src/diffpy/utils/wx/gridutils.py
index d94860ca..f585cc41 100644
--- a/src/diffpy/utils/wx/gridutils.py
+++ b/src/diffpy/utils/wx/gridutils.py
@@ -81,8 +81,9 @@ def getSelectedCells(grid):
 
 
 def limitSelectionToRows(grid, indices):
-    """Limit selection to the specified row indices. No action for empty
-    indices.
+    """Limit selection to the specified row indices.
+
+    No action for empty indices.
 
     Parameters
     ----------