diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 826292a..e8a5a9d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,22 +16,28 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python-version: "3.8"
-            os: ubuntu-20.04
+          - python-version: "3.10"
+            os: ubuntu-24.04
             piplist: "numpy matplotlib"
-          - python-version: "3.9"
-            os: ubuntu-20.04
+          - python-version: "3.11"
+            os: ubuntu-24.04
             piplist: "numpy matplotlib"
             dep-strategy: "oldest"
-          - python-version: "3.10"
-            os: ubuntu-20.04
-            piplist: "numpy matplotlib"
-          - python-version: "3.10"
-            os: ubuntu-20.04
-            piplist: "numpy matplotlib spacepy"
+          - python-version: "3.12"
+            os: ubuntu-24.04
+            piplist: "setuptools numpy matplotlib"
+          - python-version: "3.13"
+            os: ubuntu-24.04
+            piplist: "setuptools numpy matplotlib spacepy"
+          - python-version: "3.14"
+            os: ubuntu-24.04
+            piplist: "setuptools numpy matplotlib"
+          - python-version: "3.14"
+            os: ubuntu-24.04
+            piplist: "setuptools numpy matplotlib spacepy"
     steps:
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -45,7 +51,7 @@ jobs:
 # Per https://github.com/actions/checkout/issues/15, this gets the MERGE
 # commit of the PR, not just the tip of the PR.
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v6
     - name: Install and run tests
       working-directory: ${{ github.workspace }}
       run: |
@@ -55,7 +61,7 @@ jobs:
   all-tests:
     name: All tests
     if: ${{ always() }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     needs: test
     steps:
       - name: Check test matrix status
diff --git a/COPYRIGHT.md b/COPYRIGHT.md
index ac11717..53451f6 100644
--- a/COPYRIGHT.md
+++ b/COPYRIGHT.md
@@ -1,4 +1,4 @@
-Copyright (c) 2017, Triad National Security, LLC
+Copyright (c) 2017-2026, Triad National Security, LLC
 All rights reserved.
 
 This software was produced under U.S. Government contract 89233218CNA000001 for
diff --git a/tests/test_verify.py b/tests/test_verify.py
index 13a279b..66c47ae 100644
--- a/tests/test_verify.py
+++ b/tests/test_verify.py
@@ -42,8 +42,8 @@ def test_direct_array(self):
 
     def test_direct_array_floats(self):
         '''check construction direct from rates as array, force floats'''
-        ctab = verify.Contingency2x2(np.asarray(self.res), dtype=np.float)
-        npt.assert_array_equal(np.asarray(self.res, dtype=np.float), ctab)
+        ctab = verify.Contingency2x2(np.asarray(self.res), dtype=float)
+        npt.assert_array_equal(np.asarray(self.res, dtype=float), ctab)
 
     def test_direct_array3D_raises(self):
         '''check construction raises when given rates from non-2D array'''