diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ec21e034873857002a7bf1451aa6fddcce05f586..f1ded25f556ae2010a75913b6a429374402682f8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -46,3 +46,11 @@ python3.10:
   stage: test
   script:
   - python -m unittest
+
+python3.11:
+  image: python:3.11
+  tags:
+  - passoft
+  stage: test
+  script:
+  - python -m unittest
diff --git a/setup.py b/setup.py
index f8ccda710022c5e7266842dafc0dfd39fe27e14d..4ce897a36ea106973816854576150105634d642e 100644
--- a/setup.py
+++ b/setup.py
@@ -22,6 +22,7 @@ setup(
         'Natural Language :: English',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
     ],
     description="View mseed headers",
     entry_points={
diff --git a/tox.ini b/tox.ini
index 10760b0e3ae453f9ae4d704e9d5672e6b22c3390..a6f1935bdd11b6587119d9c3ae35b9f5c8d248ab 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py39, py310, flake8
+envlist = py39, py310, py311, flake8
 
 [testenv:flake8]
 basepython = python