diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d80d2d4..522ac4a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -31,8 +31,8 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
-        apt-get update -q
-        apt-get install -y libterm-readline-gnu-perl locales software-properties-common
+        apt update -q
+        apt install -y libterm-readline-gnu-perl locales software-properties-common
         locale-gen en_US.UTF-8
         ln -f -s /usr/share/zoneinfo/UTC /etc/localtime
     - name: Install dependencies
@@ -42,8 +42,8 @@ jobs:
         add-apt-repository -y universe
         add-apt-repository -y ppa:deadsnakes/ppa
         add-apt-repository -y ppa:gift/dev
-        apt-get update -q
-        apt-get install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
+        apt update -q
+        apt install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
     - name: Run linter
       env:
         LANG: en_US.UTF-8
diff --git a/.github/workflows/test_docker.yml b/.github/workflows/test_docker.yml
index 96908dc..19fc343 100644
--- a/.github/workflows/test_docker.yml
+++ b/.github/workflows/test_docker.yml
@@ -46,15 +46,15 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
-        apt-get update -q
-        apt-get install -y libterm-readline-gnu-perl locales software-properties-common
+        apt update -q
+        apt install -y libterm-readline-gnu-perl locales software-properties-common
         locale-gen en_US.UTF-8
         ln -f -s /usr/share/zoneinfo/UTC /etc/localtime
     - name: Install dependencies
       run: |
         add-apt-repository -y ppa:gift/dev
-        apt-get update -q
-        apt-get install -y build-essential python3 python3-build python3-dev python3-pip python3-setuptools python3-venv python3-wheel
+        apt update -q
+        apt install -y build-essential python3 python3-build python3-dev python3-pip python3-setuptools python3-venv python3-wheel
     - name: Run tests
       env:
         LANG: en_US.UTF-8
diff --git a/.github/workflows/test_docs.yml b/.github/workflows/test_docs.yml
index 9895e6b..5d5969c 100644
--- a/.github/workflows/test_docs.yml
+++ b/.github/workflows/test_docs.yml
@@ -22,8 +22,8 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
-        apt-get update -q
-        apt-get install -y libterm-readline-gnu-perl locales software-properties-common
+        apt update -q
+        apt install -y libterm-readline-gnu-perl locales software-properties-common
         locale-gen en_US.UTF-8
         ln -f -s /usr/share/zoneinfo/UTC /etc/localtime
     - name: Install dependencies
@@ -33,8 +33,8 @@ jobs:
         add-apt-repository -y universe
         add-apt-repository -y ppa:deadsnakes/ppa
         add-apt-repository -y ppa:gift/dev
-        apt-get update -q
-        apt-get install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
+        apt update -q
+        apt install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
     - name: Run tests
       env:
         LANG: en_US.UTF-8
diff --git a/.github/workflows/test_tox.yml b/.github/workflows/test_tox.yml
index de80a7a..db1a615 100644
--- a/.github/workflows/test_tox.yml
+++ b/.github/workflows/test_tox.yml
@@ -32,8 +32,8 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
-        apt-get update -q
-        apt-get install -y libterm-readline-gnu-perl locales software-properties-common
+        apt update -q
+        apt install -y libterm-readline-gnu-perl locales software-properties-common
         locale-gen en_US.UTF-8
         ln -f -s /usr/share/zoneinfo/UTC /etc/localtime
     - name: Install dependencies
@@ -43,8 +43,8 @@ jobs:
         add-apt-repository -y universe
         add-apt-repository -y ppa:deadsnakes/ppa
         add-apt-repository -y ppa:gift/dev
-        apt-get update -q
-        apt-get install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
+        apt update -q
+        apt install -y build-essential git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
     - name: Run tests
       env:
         LANG: en_US.UTF-8
@@ -63,8 +63,8 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
-        apt-get update -q
-        apt-get install -y libterm-readline-gnu-perl locales software-properties-common
+        apt update -q
+        apt install -y libterm-readline-gnu-perl locales software-properties-common
         locale-gen en_US.UTF-8
         ln -f -s /usr/share/zoneinfo/UTC /etc/localtime
     - name: Install dependencies
@@ -74,8 +74,8 @@ jobs:
         add-apt-repository -y universe
         add-apt-repository -y ppa:deadsnakes/ppa
         add-apt-repository -y ppa:gift/dev
-        apt-get update -q
-        apt-get install -y build-essential curl git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
+        apt update -q
+        apt install -y build-essential curl git pkg-config python${{ matrix.python-version }} python${{ matrix.python-version }}-dev python${{ matrix.python-version }}-venv python3-pip python3-setuptools tox
     - name: Run tests with coverage
       env:
         LANG: en_US.UTF-8
diff --git a/docs/sources/user/Installation-instructions.md b/docs/sources/user/Installation-instructions.md
index d1065c3..3744603 100644
--- a/docs/sources/user/Installation-instructions.md
+++ b/docs/sources/user/Installation-instructions.md
@@ -38,8 +38,8 @@ sudo add-apt-repository ppa:gift/stable
 Update and install dfDateTime:
 
 ```bash
-sudo apt-get update
-sudo apt-get install python3-dfdatetime
+sudo apt update
+sudo apt install python3-dfdatetime
 ```
 
 ## Windows
diff --git a/pyproject.toml b/pyproject.toml
index 5d2f4c9..2314a99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "dfdatetime"
-version = "20260515"
+version = "20260521"
 description = "Digital Forensics date and time (dfDateTime)"
 maintainers = [
     { name = "Log2Timeline maintainers", email = "log2timeline-maintainers@googlegroups.com" },
diff --git a/utils/dependencies.py b/utils/dependencies.py
index 9e733f8..1f7d1ed 100644
--- a/utils/dependencies.py
+++ b/utils/dependencies.py
@@ -137,12 +137,12 @@ def __init__(
 
         dependency_reader = DependencyDefinitionReader()
 
-        with open(dependencies_file, "r", encoding="utf-8") as file_object:
+        with open(dependencies_file, encoding="utf-8") as file_object:
             for dependency in dependency_reader.Read(file_object):
                 self.dependencies[dependency.name] = dependency
 
         if os.path.exists(test_dependencies_file):
-            with open(test_dependencies_file, "r", encoding="utf-8") as file_object:
+            with open(test_dependencies_file, encoding="utf-8") as file_object:
                 for dependency in dependency_reader.Read(file_object):
                     self._test_dependencies[dependency.name] = dependency