diff --git a/.github/common.env b/.github/common.env
index 11ff253f6..c9dd2d6eb 100644
--- a/.github/common.env
+++ b/.github/common.env
@@ -1,6 +1,6 @@
 # Shared common variables
 
-CI_IMAGE_VERSION=master-2779642792
-CI_TOXENV_MAIN=py310,py311,py312,py313,py314
-CI_TOXENV_PLUGINS=py310-plugins,py311-plugins,py312-plugins,py313-plugins,py314-plugins
+CI_IMAGE_VERSION=master-2783218587
+CI_TOXENV_MAIN=py310,py311,py312,py313,py314,py315
+CI_TOXENV_PLUGINS=py310-plugins,py311-plugins,py312-plugins,py313-plugins,py314-plugins,py315-plugins
 CI_TOXENV_ALL="${CI_TOXENV_MAIN},${CI_TOXENV_PLUGINS}"
diff --git a/.github/compose/ci.docker-compose.yml b/.github/compose/ci.docker-compose.yml
index 5dd7ac1d9..2b594f3ce 100644
--- a/.github/compose/ci.docker-compose.yml
+++ b/.github/compose/ci.docker-compose.yml
@@ -34,6 +34,10 @@ services:
     <<: *tests-template
     image: registry.gitlab.com/buildstream/buildstream-docker-images/testsuite-fedora:44-${CI_IMAGE_VERSION:-latest}
 
+  fedora-45:
+    <<: *tests-template
+    image: registry.gitlab.com/buildstream/buildstream-docker-images/testsuite-fedora:45-${CI_IMAGE_VERSION:-latest}
+
   ubuntu-22.04:
     <<: *tests-template
     image: registry.gitlab.com/buildstream/buildstream-docker-images/testsuite-ubuntu:22.04-${CI_IMAGE_VERSION:-latest}
@@ -116,3 +120,8 @@ services:
     <<: *tests-template
     image: quay.io/pypa/manylinux_2_28_x86_64
     command: .github/wheel-helpers/test-wheel-manylinux.sh cp314-cp314 /opt/python/cp314-cp314/bin/python3
+
+  wheels-manylinux_2_28-cp315:
+    <<: *tests-template
+    image: quay.io/pypa/manylinux_2_28_x86_64
+    command: .github/wheel-helpers/test-wheel-manylinux.sh cp315-cp315 /opt/python/cp315-cp315/bin/python3
diff --git a/.github/run-ci.sh b/.github/run-ci.sh
index f3690320e..ee6b67049 100755
--- a/.github/run-ci.sh
+++ b/.github/run-ci.sh
@@ -102,7 +102,7 @@ function runServiceTest() {
 
 
 if [ -z "${test_names}" ]; then
-    for test_name in mypy debian-12 debian-13 fedora-44 fedora-missing-deps ubuntu-22.04; do
+    for test_name in mypy debian-12 debian-13 fedora-44 fedora-45 fedora-missing-deps ubuntu-22.04; do
 	if ! runTest "${test_name}"; then
 	    echo "Tests failed"
 	    exit 1
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 657ad6f47..b6f6b48cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,6 +39,7 @@ jobs:
           - debian-12
           - debian-13
           - fedora-44
+          - fedora-45
           - fedora-missing-deps
           - ubuntu-22.04
           - lint
@@ -135,7 +136,7 @@ jobs:
         run: ${GITHUB_WORKSPACE}/.github/wheel-helpers/fetch-latest-buildbox-release.sh
 
       - name: Build wheels
-        run: pipx run cibuildwheel==v3.1.4
+        run: pipx run cibuildwheel~=4.0
 
       - uses: actions/upload-artifact@v7
         with:
@@ -157,6 +158,7 @@ jobs:
           - wheels-manylinux_2_28-cp312
           - wheels-manylinux_2_28-cp313
           - wheels-manylinux_2_28-cp314
+          - wheels-manylinux_2_28-cp315
 
     steps:
       - uses: actions/checkout@v7
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b3be858c7..e12fbb047 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -72,7 +72,7 @@ jobs:
         run: ${GITHUB_WORKSPACE}/.github/wheel-helpers/fetch-latest-buildbox-release.sh
 
       - name: Build wheels
-        run: pipx run cibuildwheel==v3.1.4
+        run: pipx run cibuildwheel~=4.0
 
       - uses: actions/upload-artifact@v7
         with:
@@ -94,6 +94,7 @@ jobs:
           - wheels-manylinux_2_28-cp312
           - wheels-manylinux_2_28-cp313
           - wheels-manylinux_2_28-cp314
+          - wheels-manylinux_2_28-cp315
 
     steps:
       - uses: actions/checkout@v7
diff --git a/requirements/cov-requirements.in b/requirements/cov-requirements.in
index 65bd5dab8..1cec99bbe 100644
--- a/requirements/cov-requirements.in
+++ b/requirements/cov-requirements.in
@@ -1,4 +1,4 @@
-coverage >= 6
+coverage >= 7.15
 pytest-cov >= 2.5.0
 pytest >= 6.0.1
 Cython
diff --git a/requirements/cov-requirements.txt b/requirements/cov-requirements.txt
index 285f5c068..a8f44bbaf 100644
--- a/requirements/cov-requirements.txt
+++ b/requirements/cov-requirements.txt
@@ -1,4 +1,4 @@
-coverage==7.13.5
+coverage==7.15.4
 pytest-cov==7.1.0
 pytest==9.0.3
 Cython==3.2.4
diff --git a/setup.py b/setup.py
index ba38f3e72..912ecee08 100755
--- a/setup.py
+++ b/setup.py
@@ -326,6 +326,7 @@ def files_from_module(modname):
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: 3.14",
+        "Programming Language :: Python :: 3.15",
         "Topic :: Software Development :: Build Tools",
     ],
     description="A framework for modelling build pipelines in YAML",
diff --git a/tox.ini b/tox.ini
index 172b659d3..3e1c8d318 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@
 # Tox global configuration
 #
 [tox]
-envlist = py{310,311,312,313,314}
+envlist = py{310,311,312,313,314,315}
 skip_missing_interpreters = true
 isolated_build = true
 
@@ -33,30 +33,30 @@ BST_PLUGINS_VERSION = 79649529cffb695d0d22195ed9a4910c80ca6907 # 2.5.0
 [testenv]
 usedevelop =
     # This is required by Cython in order to get coverage for cython files.
-    py{310,311,312,313,314}-!nocover: True
+    py{310,311,312,313,314,315}-!nocover: True
 
 commands =
     # Running with coverage reporting enabled
-    py{310,311,312,313,314}-!plugins-!nocover: pytest --basetemp {envtmpdir} --cov=buildstream --cov-config .coveragerc {posargs}
+    py{310,311,312,313,314,315}-!plugins-!nocover: pytest --basetemp {envtmpdir} --cov=buildstream --cov-config .coveragerc {posargs}
     # Running with coverage reporting disabled
-    py{310,311,312,313,314}-!plugins-nocover: pytest --basetemp {envtmpdir} {posargs}
+    py{310,311,312,313,314,315}-!plugins-nocover: pytest --basetemp {envtmpdir} {posargs}
     # Running external plugins tests with coverage reporting enabled
-    py{310,311,312,313,314}-plugins-!nocover: pytest --basetemp {envtmpdir} --cov=buildstream --cov-config .coveragerc --plugins {posargs}
+    py{310,311,312,313,314,315}-plugins-!nocover: pytest --basetemp {envtmpdir} --cov=buildstream --cov-config .coveragerc --plugins {posargs}
     # Running external plugins tests with coverage disabled
-    py{310,311,312,313,314}-plugins-nocover: pytest --basetemp {envtmpdir} --plugins {posargs}
+    py{310,311,312,313,314,315}-plugins-nocover: pytest --basetemp {envtmpdir} --plugins {posargs}
 commands_post:
-    py{310,311,312,313,314}-!nocover: mkdir -p .coverage-reports
-    py{310,311,312,313,314}-!nocover: mv {envtmpdir}/.coverage {toxinidir}/.coverage-reports/.coverage.{env:COVERAGE_PREFIX:}{envname}
+    py{310,311,312,313,314,315}-!nocover: mkdir -p .coverage-reports
+    py{310,311,312,313,314,315}-!nocover: mv {envtmpdir}/.coverage {toxinidir}/.coverage-reports/.coverage.{env:COVERAGE_PREFIX:}{envname}
 deps =
-    py{310,311,312,313,314}: -rrequirements/requirements.txt
-    py{310,311,312,313,314}: -rrequirements/dev-requirements.txt
-    py{310,311,312,313,314}: git+https://github.com/apache/buildstream-plugins.git@{env:BST_PLUGINS_VERSION:{[config]BST_PLUGINS_VERSION}}
+    py{310,311,312,313,314,315}: -rrequirements/requirements.txt
+    py{310,311,312,313,314,315}: -rrequirements/dev-requirements.txt
+    py{310,311,312,313,314,315}: git+https://github.com/apache/buildstream-plugins.git@{env:BST_PLUGINS_VERSION:{[config]BST_PLUGINS_VERSION}}
 
     # Install local sample plugins for testing pip plugin origins
-    py{310,311,312,313,314}: {toxinidir}/tests/plugins/sample-plugins
+    py{310,311,312,313,314,315}: {toxinidir}/tests/plugins/sample-plugins
 
     # Install external plugins for plugin tests
-    py{310,311,312,313,314}-plugins: git+https://gitlab.com/buildstream/buildstream-plugins-community.git@{env:BST_PLUGINS_COMMUNITY_VERSION:{[config]BST_PLUGINS_COMMUNITY_VERSION}}#egg=bst_plugins_community[deb]
+    py{310,311,312,313,314,315}-plugins: git+https://gitlab.com/buildstream/buildstream-plugins-community.git@{env:BST_PLUGINS_COMMUNITY_VERSION:{[config]BST_PLUGINS_COMMUNITY_VERSION}}#egg=bst_plugins_community[deb]
 
     # Only require coverage and pytest-cov when using it
     !nocover: -rrequirements/cov-requirements.txt
@@ -84,18 +84,18 @@ passenv =
 # These keys are not inherited by any other sections
 #
 setenv =
-    py{310,311,312,313,314}: COVERAGE_FILE = {envtmpdir}/.coverage
-    py{310,311,312,313,314}: BST_TEST_HOME = {envtmpdir}
-    py{310,311,312,313,314}: BST_TEST_XDG_CACHE_HOME = {envtmpdir}/cache
-    py{310,311,312,313,314}: BST_TEST_XDG_CONFIG_HOME = {envtmpdir}/config
-    py{310,311,312,313,314}: BST_TEST_XDG_DATA_HOME = {envtmpdir}/share
+    py{310,311,312,313,314,315}: COVERAGE_FILE = {envtmpdir}/.coverage
+    py{310,311,312,313,314,315}: BST_TEST_HOME = {envtmpdir}
+    py{310,311,312,313,314,315}: BST_TEST_XDG_CACHE_HOME = {envtmpdir}/cache
+    py{310,311,312,313,314,315}: BST_TEST_XDG_CONFIG_HOME = {envtmpdir}/config
+    py{310,311,312,313,314,315}: BST_TEST_XDG_DATA_HOME = {envtmpdir}/share
 
     # This is required to get coverage for Cython
-    py{310,311,312,313,314}-!nocover: BST_CYTHON_TRACE = 1
+    py{310,311,312,313,314,315}-!nocover: BST_CYTHON_TRACE = 1
     randomized: PYTEST_ADDOPTS="--random-order-bucket=global"
 
 allowlist_externals =
-    py{310,311,312,313,314}:
+    py{310,311,312,313,314,315}:
         mv
         mkdir