diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a83d079..b2e61525 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -48,12 +48,12 @@ jobs:
       matrix:
         os: ${{ fromJson(needs.matrix_config.outputs.matrix_os) }}
         python:
-            - {minor: 10, req_test: 'requirements-dev-3_11.txt', ft: '0'}
-            - {minor: 11, req_test: 'requirements-dev-3_11.txt', ft: '0'}
             - {minor: 12, req_test: 'requirements-dev-3_12.txt', ft: '0'}
             - {minor: 13, req_test: 'requirements-dev-3_13.txt', ft: '0'}
             - {minor: 14, req_test: 'requirements-dev-3_14.txt', ft: '0'}
             - {minor: 14t, req_test: 'requirements-dev-3_14.txt', ft: '1'}
+            - {minor: 15, req_test: 'requirements-dev-3_15.txt', ft: '0'}
+            - {minor: 15t, req_test: 'requirements-dev-3_15.txt', ft: '1'}
 
     runs-on: ${{ matrix.os }}
     outputs:
@@ -66,7 +66,7 @@ jobs:
       - run: echo '::add-matcher::.github/problem-matchers/msvc.json'
         if: startsWith(matrix.os, 'windows-')
 
-      - uses: pypa/cibuildwheel@v3.2.0
+      - uses: pypa/cibuildwheel@v4.3.2
         if: matrix.os != 'macos-15-xlarge'
         with:
           output-dir: dist
@@ -76,11 +76,10 @@ jobs:
           CIBW_ARCHS_MACOS: x86_64
           CIBW_BEFORE_TEST: pip install -r {project}/${{ matrix.python.req_test }}
           CIBW_TEST_COMMAND: pytest {project}/test
-          CIBW_ENABLE: ${{ matrix.python.ft == '1' && 'cpython-freethreading' || '' }}
 
       - run: pip install pipx
         if: matrix.os == 'macos-15-xlarge'
-      - uses: pypa/cibuildwheel@v3.2.0
+      - uses: pypa/cibuildwheel@v4.3.2
         if: matrix.os == 'macos-15-xlarge'
         with:
           output-dir: dist
@@ -88,7 +87,6 @@ jobs:
           CIBW_BUILD: cp3${{ matrix.python.minor }}-macosx_arm64
           CIBW_BEFORE_TEST: pip install -r {project}/${{ matrix.python.req_test }}
           CIBW_TEST_COMMAND: pytest {project}/test
-          CIBW_ENABLE: ${{ matrix.python.ft == '1' && 'cpython-freethreading' || '' }}
 
       - uses: actions/upload-artifact@v4
         with:
diff --git a/README.rst b/README.rst
index cda1545d..c9ad0b99 100644
--- a/README.rst
+++ b/README.rst
@@ -35,6 +35,12 @@ ArrayKit requires the following:
 What is New in ArrayKit
 -------------------------
 
+1.13.0
+............
+
+Now building wheels for Python 3.15 and 3.15t. No longer building wheels for Python 3.10 and Python 3.11.
+
+
 1.12.0
 ............
 
diff --git a/VERSION b/VERSION
index 6f64e1cc..feaae22b 100644
--- a/VERSION
+++ b/VERSION
@@ -1,2 +1 @@
-1.12.0
-
+1.13.0
diff --git a/pyproject.toml b/pyproject.toml
index 45d46dbd..a1367d5b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
   "setuptools>=64",
   "wheel",
-  "numpy>=2.2"
+  "numpy==2.5.4"
 ]
 build-backend = "setuptools.build_meta"
 
@@ -10,7 +10,7 @@ build-backend = "setuptools.build_meta"
 name = "arraykit"
 description = "Array utilities for StaticFrame"
 readme = { file = "README.rst", content-type = "text/x-rst" }
-requires-python = ">=3.10"
+requires-python = ">=3.12"
 
 dynamic = ["version"]
 
@@ -33,11 +33,10 @@ classifiers = [
   "Operating System :: MacOS :: MacOS X",
   "Operating System :: Microsoft :: Windows",
   "Operating System :: POSIX",
-  "Programming Language :: Python :: 3.10",
-  "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Free Threading",
   "Typing :: Typed",
 ]
diff --git a/requirements-dev-3_15.txt b/requirements-dev-3_15.txt
new file mode 100644
index 00000000..ce2b0a67
--- /dev/null
+++ b/requirements-dev-3_15.txt
@@ -0,0 +1,4 @@
+numpy==2.5.4
+pytest==9.0.3
+nox==2025.5.1
+hypothesis==6.131.16