diff --git a/.github/workflows/check-code-and-docs-validation.yml b/.github/workflows/check-code-and-docs-validation.yml
index 20221f40..b6825d8d 100644
--- a/.github/workflows/check-code-and-docs-validation.yml
+++ b/.github/workflows/check-code-and-docs-validation.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
         with:
-          python-version: "3.14"
+          python-version: "3.15"
 
       - name: Install uv from vendored wheel
         run: pip install --no-index --find-links=./thirdparty/dist uv
diff --git a/Dockerfile b/Dockerfile
index 058abaea..bd3baf36 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@
 # See https://aboutcode.org for more information about AboutCode FOSS projects.
 #
 
-FROM python:3.14-slim
+FROM python:3.15-slim-trixie
 
 LABEL org.opencontainers.image.source="https://github.com/aboutcode-org/dejacode"
 LABEL org.opencontainers.image.description="DejaCode"
@@ -36,6 +36,7 @@ RUN apt-get update \
       build-essential \
       libldap2-dev \
       libsasl2-dev \
+      libyaml-dev \
       slapd \
       ldap-utils \
       libpq5 \
diff --git a/Makefile b/Makefile
index 00f8a74c..21e012f5 100644
--- a/Makefile
+++ b/Makefile
@@ -117,13 +117,13 @@ upgrade:
 		--platform manylinux_2_28_x86_64 \
 		--platform manylinux_2_17_x86_64 \
 		--platform manylinux_2_12_x86_64 \
-		--python-version 3.14 \
+		--python-version 3.15 \
 		--dest ./thirdparty/dist/
 	@echo "-> Download $(PACKAGE) wheels for macOS ARM64"
 	uvx pip download $(PACKAGE) \
 		--only-binary=:all: \
 		--platform macosx_11_0_arm64 \
-		--python-version 3.14 \
+		--python-version 3.15 \
 		--dest ./thirdparty/dist/
 	@echo "-> Update pyproject.toml and uv.lock"
 	uvx uv add $(PACKAGE)
diff --git a/pyproject.toml b/pyproject.toml
index bd84a899..3f763570 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "dejacode"
 version = "6.0.1"
 description = "Automate open source license compliance and ensure supply chain integrity"
 readme = "README.rst"
-requires-python = ">=3.14,<3.15"
+requires-python = ">=3.15,<3.16"
 license = "AGPL-3.0-only"
 license-files = ["LICENSE", "NOTICE"]
 authors = [
@@ -26,7 +26,7 @@ classifiers = [
     "Intended Audience :: Legal Industry",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
     "Topic :: Utilities"
 ]
 dependencies = [
@@ -89,6 +89,10 @@ dependencies = [
     "idna==3.20",
     "charset-normalizer==3.5.2",
     "PyYAML==6.0.3",
+    # Build requirement of the PyYAML sdist: PyYAML publishes no cp315 wheel, so pip
+    # builds it from source, and the offline install needs Cython in thirdparty/dist.
+    # libyaml-dev in the Dockerfile enables the PyYAML C extension.
+    "Cython==3.3.1",
     # Markdown
     "markdown==3.11.2",
     "bleach==6.4.0",
diff --git a/thirdparty/dist/charset_normalizer-3.5.2-cp314-cp314-macosx_10_15_universal2.whl b/thirdparty/dist/charset_normalizer-3.5.2-cp314-cp314-macosx_10_15_universal2.whl
deleted file mode 100644
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diff --git a/thirdparty/dist/charset_normalizer-3.5.2-cp315-cp315-macosx_10_15_universal2.whl b/thirdparty/dist/charset_normalizer-3.5.2-cp315-cp315-macosx_10_15_universal2.whl
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diff --git a/thirdparty/dist/cython-3.3.1-cp315-cp315-macosx_11_0_arm64.whl b/thirdparty/dist/cython-3.3.1-cp315-cp315-macosx_11_0_arm64.whl
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diff --git a/thirdparty/dist/lxml-6.1.3-cp314-cp314-manylinux_2_26_x86_64.manylinux_2_28_x86_64.whl b/thirdparty/dist/lxml-6.1.3-cp314-cp314-manylinux_2_26_x86_64.manylinux_2_28_x86_64.whl
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similarity index 54%
rename from thirdparty/dist/lxml-6.1.3-cp314-cp314-macosx_10_15_universal2.whl
rename to thirdparty/dist/lxml-6.1.3-cp315-cp315-macosx_10_15_universal2.whl
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diff --git a/thirdparty/dist/msgspec-0.22.0-cp315-cp315-macosx_11_0_arm64.whl b/thirdparty/dist/msgspec-0.22.0-cp315-cp315-macosx_11_0_arm64.whl
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diff --git a/thirdparty/dist/pydantic_core-2.50.2-cp314-cp314-macosx_11_0_arm64.whl b/thirdparty/dist/pydantic_core-2.50.2-cp314-cp314-macosx_11_0_arm64.whl
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diff --git a/thirdparty/dist/pyyaml-6.0.3-cp314-cp314-macosx_11_0_arm64.whl b/thirdparty/dist/pyyaml-6.0.3-cp314-cp314-macosx_11_0_arm64.whl
deleted file mode 100644
index ff9fd486..00000000
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diff --git a/thirdparty/dist/pyyaml-6.0.3-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl b/thirdparty/dist/pyyaml-6.0.3-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
deleted file mode 100644
index 61918450..00000000
Binary files a/thirdparty/dist/pyyaml-6.0.3-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl and /dev/null differ
diff --git a/uv.lock b/uv.lock
index 2d7812e1..8dccdeba 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,6 +1,6 @@
 version = 1
 revision = 5
-requires-python = "==3.14.*"
+requires-python = "==3.15.*"
 resolution-markers = [
     "sys_platform == 'linux'",
     "sys_platform == 'darwin'",
@@ -70,8 +70,8 @@ name = "charset-normalizer"
 version = "3.5.2"
 source = { registry = "thirdparty/dist" }
 wheels = [
-    { path = "charset_normalizer-3.5.2-cp314-cp314-macosx_10_15_universal2.whl" },
-    { path = "charset_normalizer-3.5.2-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
+    { path = "charset_normalizer-3.5.2-cp315-cp315-macosx_10_15_universal2.whl" },
+    { path = "charset_normalizer-3.5.2-cp315-cp315-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
 ]
 
 [[package]]
@@ -127,6 +127,15 @@ wheels = [
     { path = "cyclonedx_python_lib-11.12.0-py3-none-any.whl" },
 ]
 
+[[package]]
+name = "cython"
+version = "3.3.1"
+source = { registry = "thirdparty/dist" }
+wheels = [
+    { path = "cython-3.3.1-cp315-cp315-macosx_11_0_arm64.whl" },
+    { path = "cython-3.3.1-cp315-cp315-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
+]
+
 [[package]]
 name = "defusedxml"
 version = "0.7.1"
@@ -152,6 +161,7 @@ dependencies = [
     { name = "crispy-bootstrap5" },
     { name = "croniter" },
     { name = "cyclonedx-python-lib" },
+    { name = "cython" },
     { name = "defusedxml" },
     { name = "django" },
     { name = "django-altcha" },
@@ -229,6 +239,7 @@ requires-dist = [
     { name = "crispy-bootstrap5", specifier = "==2026.9" },
     { name = "croniter", specifier = "==6.2.4" },
     { name = "cyclonedx-python-lib", specifier = "==11.12.0" },
+    { name = "cython", specifier = "==3.3.1" },
     { name = "defusedxml", specifier = "==0.7.1" },
     { name = "django", specifier = "==6.1.2" },
     { name = "django-altcha", specifier = "==1.0.0" },
@@ -522,8 +533,8 @@ name = "lxml"
 version = "6.1.3"
 source = { registry = "thirdparty/dist" }
 wheels = [
-    { path = "lxml-6.1.3-cp314-cp314-macosx_10_15_universal2.whl" },
-    { path = "lxml-6.1.3-cp314-cp314-manylinux_2_26_x86_64.manylinux_2_28_x86_64.whl" },
+    { path = "lxml-6.1.3-cp315-cp315-macosx_10_15_universal2.whl" },
+    { path = "lxml-6.1.3-cp315-cp315-manylinux_2_26_x86_64.manylinux_2_28_x86_64.whl" },
 ]
 
 [[package]]
@@ -550,8 +561,8 @@ name = "msgspec"
 version = "0.22.0"
 source = { registry = "thirdparty/dist" }
 wheels = [
-    { path = "msgspec-0.22.0-cp314-cp314-macosx_11_0_arm64.whl" },
-    { path = "msgspec-0.22.0-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
+    { path = "msgspec-0.22.0-cp315-cp315-macosx_11_0_arm64.whl" },
+    { path = "msgspec-0.22.0-cp315-cp315-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
 ]
 
 [[package]]
@@ -653,8 +664,8 @@ dependencies = [
     { name = "typing-extensions" },
 ]
 wheels = [
-    { path = "pydantic_core-2.50.2-cp314-cp314-macosx_11_0_arm64.whl" },
-    { path = "pydantic_core-2.50.2-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.whl" },
+    { path = "pydantic_core-2.50.2-cp315-cp315-macosx_11_0_arm64.whl" },
+    { path = "pydantic_core-2.50.2-cp315-cp315-manylinux2014_x86_64.manylinux_2_17_x86_64.whl" },
 ]
 
 [[package]]
@@ -692,10 +703,6 @@ name = "pyyaml"
 version = "6.0.3"
 source = { registry = "thirdparty/dist" }
 sdist = { path = "pyyaml-6.0.3.tar.gz" }
-wheels = [
-    { path = "pyyaml-6.0.3-cp314-cp314-macosx_11_0_arm64.whl" },
-    { path = "pyyaml-6.0.3-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl" },
-]
 
 [[package]]
 name = "qrcode"