diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 52b39b7..51b55ef 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,11 +42,12 @@ jobs:
         os: ["ubuntu-22.04"]
         include:
           - { python-version: "3.12", os: "ubuntu-latest" }
+          - { python-version: "3.13", os: "ubuntu-latest" }
     steps:
-      - uses: "actions/checkout@v3"
+      - uses: "actions/checkout@v4"
         with:
           ref: ${{ inputs.tag || github.ref }}
-      - uses: "actions/setup-python@v4"
+      - uses: "actions/setup-python@v5"
         with:
           python-version: "${{ matrix.python-version }}"
           allow-prereleases: true
@@ -63,10 +64,10 @@ jobs:
     runs-on: "ubuntu-latest"
     needs: tests
     steps:
-      - uses: "actions/checkout@v3"
+      - uses: "actions/checkout@v4"
         with:
           ref: ${{ inputs.tag || github.ref }}
-      - uses: "actions/setup-python@v4"
+      - uses: "actions/setup-python@v5"
         with:
           python-version: "3.x"
           cache: "pip"
@@ -77,14 +78,14 @@ jobs:
       - name: "Run 'build'"
         run: "python -m build"
       - name: "Upload sdist artifact"
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: sdist
           path: |
             dist/pyasn1*.tar.gz
           if-no-files-found: error
       - name: "Upload wheel artifact"
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: wheel
           path: |
diff --git a/setup.cfg b/setup.cfg
index 877be42..e5db9d0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,6 +33,7 @@ classifiers =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Communications
diff --git a/tox.ini b/tox.ini
index 2e4d3ad..ee8971d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 3.5.0
 envlist =
-    py{38, 39, 310, 311, 312, py38, py39}
+    py{38, 39, 310, 311, 312, 313, py38, py39}
     cover, bandit, build
 isolated_build = true
 skip_missing_interpreters = true
@@ -44,5 +44,6 @@ python =
     3.10: py310, cover, build, bandit
     3.11: py311
     3.12: py312
+    3.13: py313
     pypy-3.8: pypy38
     pypy-3.9: pypy39