diff --git a/.github/workflows/build-cysignals.yml b/.github/workflows/build-cysignals.yml
index 2ff7a5ab47a..b4277d9aede 100644
--- a/.github/workflows/build-cysignals.yml
+++ b/.github/workflows/build-cysignals.yml
@@ -53,7 +53,11 @@ jobs:
       fail-fast: false
       matrix:
         version: ${{ fromJSON(needs.setup.outputs.versions) }}
-        python: ["cp312", "cp313", "cp314", "cp314t"]
+        # 1.13.0 raised requires-python to >=3.13 (was >=3.12 in 1.12.6), so
+        # cp312 is no longer a valid build target: cibuildwheel selects zero
+        # build identifiers for it and exits with "No build identifiers
+        # selected".
+        python: ["cp313", "cp314", "cp314t"]
         libc: [manylinux, musllinux]
 
     env:
@@ -67,6 +71,15 @@ jobs:
           ref: ${{ env.CYSIGNALS_VERSION }}
           persist-credentials: false
 
+      - name: Checkout python-wheels
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          path: python-wheels
+          persist-credentials: false
+
+      - name: Patch cysignals source
+        run: git apply python-wheels/patches/cysignals/${{ env.CYSIGNALS_VERSION }}/00*.patch
+
       - name: Build wheels
         uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
         with:
@@ -87,7 +100,10 @@ jobs:
           for whl in sys.argv[1:]:
               names = zipfile.ZipFile(whl).namelist()
               assert any(n.startswith("cysignals/") and n.endswith(".so") for n in names), whl
-              assert any(n.endswith(".dist-info/LICENSE") for n in names), whl
+              # meson-python 0.22 implements PEP 639: license files land under
+              # <dist-info>/licenses/, not directly in <dist-info>/ as older
+              # (setuptools-era) tooling placed them.
+              assert any(n.endswith(".dist-info/licenses/LICENSE") for n in names), whl
               print(whl, "ok")
           EOF
 
diff --git a/docs/packages/cysignals.yaml b/docs/packages/cysignals.yaml
index a2a7e4d0667..9a52c3c4d57 100644
--- a/docs/packages/cysignals.yaml
+++ b/docs/packages/cysignals.yaml
@@ -29,3 +29,4 @@ versions:
   - filename: cysignals-1.12.6-cp314-cp314t-musllinux_1_2_riscv64.whl
     sha256: a56bb87556d4d68c742a5fb7cf9ade409267917c39c139807008cf870f37c3b3
     requires-python: '>=3.12'
+- version: 1.13.0
diff --git a/patches/cysignals/1.13.0/0001-Drop-cpython-freethreading-from-the-cibuildwheel-ena.patch b/patches/cysignals/1.13.0/0001-Drop-cpython-freethreading-from-the-cibuildwheel-ena.patch
new file mode 100644
index 00000000000..1725f30ac3b
--- /dev/null
+++ b/patches/cysignals/1.13.0/0001-Drop-cpython-freethreading-from-the-cibuildwheel-ena.patch
@@ -0,0 +1,38 @@
+From: Ludovic Henry <git@ludovic.dev>
+Subject: [PATCH] Drop cpython-freethreading from the cibuildwheel enable
+ groups
+
+cibuildwheel 3.0 removed the cpython-freethreading enable group -
+free-threaded builds are selected by the build identifier itself now,
+not an opt-in group - and its config parser rejects the value outright,
+before any container starts and for every interpreter in the matrix:
+
+  Failed to parse enable group. Unknown enable group:
+  cpython-freethreading. Valid group names are: cpython-prerelease,
+  graalpy, pypy, pypy-eol, pyodide-eol, pyodide-prerelease
+
+Upstream's own dev dependency group pins cibuildwheel>=2.23.3, where
+the group is still valid and is what enables its cp313t wheels, so
+dropping it upstream would lose those wheels there. Setting
+CIBW_ENABLE="" in the workflow env does not help: cibuildwheel merges
+the env var's groups into pyproject.toml's list rather than replacing
+it, so an empty override leaves cpython-freethreading in place.
+
+Upstream-Status: Inappropriate [needed only for cibuildwheel 3.0+, which python-wheels pins repo-wide; upstream pins cibuildwheel>=2.23.3]
+---
+ pyproject.toml | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/pyproject.toml b/pyproject.toml
+index 1111111..2222222 100644
+--- a/pyproject.toml
++++ b/pyproject.toml
+@@ -52,6 +52,5 @@ dev = [
+ ]
+
+ [tool.cibuildwheel]
+-enable = ["cpython-freethreading"]
+ skip = ["*-win32", "cp313t-*"]
+ test-groups = ["dev"]
+--
+2.43.0