diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 48be6a1..a7797c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,11 +3,17 @@
 ---
 name: CI
 
-on: [push, pull_request]
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
@@ -23,24 +29,24 @@ jobs:
       - run: python -m tox -e lint
 
   check-commits:
-    if: github.event_name == 'pull_request'
+    if: ${{ github.event.pull_request.commits }}
     runs-on: ubuntu-latest
     env:
-      LYPY_START_COMMIT: "${{ github.event.pull_request.base.sha }}"
-      LYPY_END_COMMIT: "${{ github.event.pull_request.head.sha }}"
+      LYPY_COMMIT_RANGE: "HEAD~${{ github.event.pull_request.commits }}.."
     steps:
       - run: sudo apt-get install git make
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha || github.ref }}
       - run: make check-commits
 
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         include:
-          - python: 3.9
+          - python: "3.9"
             toxenv: py39
           - python: "3.10"
             toxenv: py310
@@ -56,7 +62,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.python }}
+          python-version: "${{ matrix.python }}"
       - uses: actions/cache@v3
         with:
           path: ~/.cache/pip
@@ -86,7 +92,7 @@ jobs:
   deploy:
     needs: [lint, test]
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.03
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
diff --git a/Makefile b/Makefile
index 6e9c436..fc9a6ea 100644
--- a/Makefile
+++ b/Makefile
@@ -12,10 +12,9 @@ tests:
 format:
 	tox -e format
 
-LYPY_START_COMMIT ?= origin/master
-LYPY_END_COMMIT ?= HEAD
+LYPY_COMMIT_RANGE ?= origin/master..
 
 check-commits:
-	./check-commits.sh $(LYPY_START_COMMIT)..$(LYPY_END_COMMIT)
+	./check-commits.sh $(LYPY_COMMIT_RANGE)
 
 .PHONY: lint tests format check-commits
diff --git a/libyang/schema.py b/libyang/schema.py
index 2e3a115..3f3bd4d 100644
--- a/libyang/schema.py
+++ b/libyang/schema.py
@@ -1542,9 +1542,7 @@ def defaults(self) -> Iterator[Union[None, bool, int, str, float]]:
 
     def max_elements(self) -> Optional[int]:
         return (
-            self.cdata_leaflist.max
-            if self.cdata_leaflist.max != (2**32 - 1)
-            else None
+            self.cdata_leaflist.max if self.cdata_leaflist.max != (2**32 - 1) else None
         )
 
     def min_elements(self) -> int:
diff --git a/libyang/util.py b/libyang/util.py
index d640a51..c380ae5 100644
--- a/libyang/util.py
+++ b/libyang/util.py
@@ -121,4 +121,6 @@ def data_load(in_type, in_data, data, data_keepalive, encode=True):
         c_str = str2c(in_data, encode=encode)
         data_keepalive.append(c_str)
         ret = lib.ly_in_new_memory(c_str, data)
+    else:
+        raise ValueError("invalid input")
     return ret
diff --git a/libyang/xpath.py b/libyang/xpath.py
index ad5f2a5..e2a3319 100644
--- a/libyang/xpath.py
+++ b/libyang/xpath.py
@@ -85,7 +85,7 @@ def xpath_split(xpath: str) -> Iterator[Tuple[str, str, List[Tuple[str, str]]]]:
 
 # -------------------------------------------------------------------------------------
 def _xpath_keys_to_key_name(
-    keys: List[Tuple[str, str]]
+    keys: List[Tuple[str, str]],
 ) -> Optional[Union[str, Tuple[str, ...]]]:
     """
     Extract key name from parsed xpath keys returned by xpath_split. The return value
diff --git a/pylintrc b/pylintrc
index 16a9f0a..acf2733 100644
--- a/pylintrc
+++ b/pylintrc
@@ -74,6 +74,7 @@ disable=
 	too-many-branches,
 	too-many-lines,
 	too-many-locals,
+	too-many-positional-arguments,
 	too-many-return-statements,
 	too-many-statements,
 	unused-argument,
diff --git a/tox.ini b/tox.ini
index b6b12c4..524ad49 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,8 +36,8 @@ basepython = python3
 description = Format python code using isort and black.
 changedir = .
 deps =
-	black~=23.12.1
-	isort~=5.13.2
+	black~=25.1.0
+	isort~=6.0.0
 skip_install = true
 install_command = python3 -m pip install {opts} {packages}
 allowlist_externals =
@@ -52,14 +52,14 @@ basepython = python3
 description = Run coding style checks.
 changedir = .
 deps =
-	astroid~=3.0.2
-	black~=23.12.1
-	flake8~=7.0.0
-	isort~=5.13.2
-	pycodestyle~=2.11.1
+	astroid~=3.3.8
+	black~=25.1.0
+	flake8~=7.1.1
+	isort~=6.0.0
+	pycodestyle~=2.12.1
 	pyflakes~=3.2.0
-	pylint~=3.0.3
-	setuptools~=69.0.3
+	pylint~=3.3.4
+	setuptools~=75.8.0
 allowlist_externals =
 	/bin/sh
 	/usr/bin/sh