diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b36e523..9d7da9e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,13 +15,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "pypy3.9"]
+        python-version: ["3.9", "3.10", "3.11",  "3.12", "3.13", "pypy3.9"]
         os: [ubuntu-latest, macos-latest, windows-latest]
         exclude:
           - os: macos-latest
-            python-version:  "pypy3.9"
-          - os: macos-latest
-            python-version:  "3.7"
+            python-version:  "pypy3.9"          
           - os: windows-latest
             python-version:  "pypy3.9"
     runs-on: ${{ matrix.os }}
@@ -36,8 +34,8 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        pip install -U "pip>=23.1.2"
-        pip install -U "tox-gh-actions==3.1.0" coverage
+        pip install -U "pip>=25.1.1"
+        pip install -U "tox-gh-actions==3.3.0" coverage
     - name: Log python & pip versions
       run: |
         python --version
@@ -56,11 +54,11 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v4
       with:
-        python-version: "3.10"
+        python-version: "3.12"
     - name: Install dependencies
       run: |
         pip install -U setuptools 
-        pip install -U "tox>=4.5.1,<5"
+        pip install -U "tox>=4.26.0,<5"
     - run: tox -e lint
   package:
     name: Build & verify package
@@ -69,7 +67,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.12"
       - name: Install build, check-wheel-content, and twine
         run: "python -m pip install build twine check-wheel-contents"
       - name: Build package
diff --git a/pyproject.toml b/pyproject.toml
index 02dd722..312cf88 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,8 +1,5 @@
 [build-system]
-requires = [
-    "setuptools >= 39.2.0",
-    "wheel >= 0.29.0",
-]
+requires = ["setuptools >= 39.2.0", "wheel >= 0.29.0"]
 build-backend = 'setuptools.build_meta'
 
 
@@ -18,4 +15,4 @@ line_length = 120
 
 [tool.black]
 line-length = 120
-target-version = ["py38"]
\ No newline at end of file
+target-version = ["py311", "py312", "py313"]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3d74880..cb053a0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@ PyYAML==5.4.1
 cov-core==1.15.0
 coverage==5.5
 coveralls==1.5.1
-cryptography==43.0.1
+cryptography==45.0.3
 docopt==0.6.2
 pytest==6.2.3
 pytest-cov==2.11.1
diff --git a/setup.cfg b/setup.cfg
index 34bca8b..adaca53 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,12 +20,12 @@ classifiers =
     License :: OSI Approved :: MIT License
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3 :: Only    
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Utilities
 
diff --git a/tox.ini b/tox.ini
index d8862a8..8f68f76 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,17 +1,17 @@
 [tox]
 min_version = 4.4
 envlist =
-    py{37,38,39,310,311,py3}-{base,cryptography-only,pycryptodome-norsa,compatibility},
+    py{39,310,311,312,313,py3}-{base,cryptography-only,pycryptodome-norsa,compatibility},
     lint
 skip_missing_interpreters = True
 
 [gh-actions]
-python =
-    3.7: py37-{base,cryptography-only,pycryptodome-norsa,compatibility}
-    3.8: py38-{base,cryptography-only,pycryptodome-norsa,compatibility}
+python =    
     3.9: py39-{base,cryptography-only,pycryptodome-norsa,compatibility}
     3.10: py310-{base,cryptography-only,pycryptodome-norsa,compatibility}
     3.11: py311-{base,cryptography-only,pycryptodome-norsa,compatibility}
+    3.12: py312-{base,cryptography-only,pycryptodome-norsa,compatibility}
+    3.13: py313-{base,cryptography-only,pycryptodome-norsa,compatibility}
     pypy-3.9: pypy3-{base,cryptography-only,pycryptodome-norsa,compatibility}
 
 [testenv:basecommand]
@@ -56,7 +56,7 @@ extras =
     compatibility: {[testenv:compatibility]extras}
 
 [testenv:lint]
-basepython = python3.10
+basepython = python3.12
 skip_install= True
 deps =
     flake8
@@ -69,7 +69,7 @@ commands =
 
 
 [testenv:lintfix]
-basepython = python3.10
+basepython = python3.12
 skip_install= True
 deps =
     isort