diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89d54f0..a85d647 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,10 +54,10 @@ jobs:
         python: ["3.11", "3.12", "3.13", "3.14"]
     env:
       # WIRELOG_VERSION here is the exact wirelog ref CI builds against.
-      # The default is pinned to the wirelog v0.52.0 release commit;
+      # The default is pinned to the wirelog v0.53.0 release commit;
       # override the repository variable to test another ref before
       # updating this fallback.
-      WIRELOG_VERSION: ${{ vars.WIRELOG_VERSION || 'da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba' }}
+      WIRELOG_VERSION: ${{ vars.WIRELOG_VERSION || '668f82ad69c2bbfc8e8111839302adf1360f55da' }}
       # `runner.temp` is NOT available in job-level `env:` (only in
       # step-level contexts) — using it here caused the whole workflow
       # to fail at startup (#114). `github.workspace` IS resolvable at
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fd48eb..6868796 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,16 @@ wirelog floor and a validated wirelog ref (see
 
 ## [Unreleased]
 
+## [1.0.4] - 2026-07-31
+
+### Changed
+- The bundled and validated wirelog ref moves from `v0.52.0` to
+  `v0.53.0` at peeled SHA
+  `668f82ad69c2bbfc8e8111839302adf1360f55da`.
+- The minimum compatible runtime wirelog version remains `0.52.0`;
+  wirelog 0.53.0 does not change the public C headers or library SONAME.
+  The PyreWire public API is unchanged.
+
 ## [1.0.3] - 2026-06-28
 
 ### Changed
@@ -174,7 +184,8 @@ runtime wirelog version remaining `0.44.0`.
   wirelog#852. They are available in the later [1.0.0] line, whose
   validated wirelog ref is v0.50.0. Tracked in wirelog#859.
 
-[Unreleased]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.3...HEAD
+[Unreleased]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.4...HEAD
+[1.0.4]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.3...v1.0.4
 [1.0.3]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.2...v1.0.3
 [1.0.2]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.1...v1.0.2
 [1.0.1]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.0...v1.0.1
diff --git a/docs/support.md b/docs/support.md
index c3075cf..21f8911 100644
--- a/docs/support.md
+++ b/docs/support.md
@@ -19,8 +19,8 @@ not need to install wirelog separately.
 | macOS | `arm64` | `macos-15` | Apple Silicon only for v1.0; no macOS Intel or universal2 wheel is produced. |
 | Windows | `win_amd64` / `AMD64` | `windows-2025-vs2026` | Built with MSVC and repaired with delvewheel. |
 
-The bundled library is built from wirelog v0.52.0, using peeled SHA
-`da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba`.
+The bundled library is built from wirelog v0.53.0, using peeled SHA
+`668f82ad69c2bbfc8e8111839302adf1360f55da`.
 
 ## Source Distributions
 
diff --git a/docs/versioning.md b/docs/versioning.md
index 0bb9c6d..c288e62 100644
--- a/docs/versioning.md
+++ b/docs/versioning.md
@@ -58,6 +58,7 @@ release to publish; it is **not** tied to the wirelog change.
 | `1.0.1`         | `0.44.0`        | `0c6e0cdaee7db069be5d8d896bb59bdcb15673e9` | Validated against wirelog `v0.51.0` (peeled tag SHA); runtime minimum remains `0.44.0`. Bundled engine bumped to pick up the wirelog#914 single-body-rule derivation fix (#165). |
 | `1.0.2`         | `0.44.0`        | `0c6e0cdaee7db069be5d8d896bb59bdcb15673e9` | Validated against wirelog `v0.51.0` (peeled tag SHA); runtime minimum remains `0.44.0`. PyreWire-only maintenance release (CI action bumps, SPDX headers, docs); no engine change. |
 | `1.0.3`         | `0.52.0`        | `da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba` | Validated against wirelog `v0.52.0` (peeled tag SHA); runtime minimum raised to `0.52.0`. Bundled engine bumped to v0.52.0 and the loader floor moved up to match. |
+| `1.0.4`         | `0.52.0`        | `668f82ad69c2bbfc8e8111839302adf1360f55da` | Validated against wirelog `v0.53.0` (peeled tag SHA); runtime minimum remains `0.52.0`. Bundled engine bumped to v0.53.0 with no public C header or SONAME change. |
 
 The table grows with every release; the source of truth is the
 [CHANGELOG](https://github.com/semantic-reasoning/PyreWire/blob/main/CHANGELOG.md).
diff --git a/pyproject.toml b/pyproject.toml
index 0a5895e..42ce70d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pyrewire"
-version = "1.0.3"
+version = "1.0.4"
 description = "Python wrapper for wirelog - declarative dataflow analysis"
 readme = "README.md"
 requires-python = ">=3.11"
@@ -74,7 +74,7 @@ test-requires = ["pytest", "pytest-cov"]
 before-build = "python {project}/scripts/bundle_libwirelog.py"
 # Pin the wirelog source ref here too so the environment matches the
 # `WIRELOG_VERSION` used by the test-matrix workflow.
-environment = { WIRELOG_VERSION = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba" }
+environment = { WIRELOG_VERSION = "668f82ad69c2bbfc8e8111839302adf1360f55da" }
 
 [tool.cibuildwheel.linux]
 manylinux-x86_64-image = "manylinux_2_28"
@@ -83,7 +83,7 @@ before-all = """
   pip install meson && \
   WIRELOG_PREFIX=/wirelog-install bash {project}/scripts/build_wirelog.sh
 """
-environment = { WIRELOG_VERSION = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba", WIRELOG_PREFIX = "/wirelog-install", WIRELOG_LIB = "/wirelog-install/lib/libwirelog.so.1", LD_LIBRARY_PATH = "/wirelog-install/lib" }
+environment = { WIRELOG_VERSION = "668f82ad69c2bbfc8e8111839302adf1360f55da", WIRELOG_PREFIX = "/wirelog-install", WIRELOG_LIB = "/wirelog-install/lib/libwirelog.so.1", LD_LIBRARY_PATH = "/wirelog-install/lib" }
 # `auditwheel` bundles libwirelog.so.1 into the wheel and patches the
 # RPATH (#31). Without this every wheel would ship as a manylinux
 # wheel that immediately fails at import time on systems without the
@@ -96,7 +96,7 @@ before-all = """
   brew install ninja meson pkg-config && \
   WIRELOG_PREFIX=$HOME/wirelog-install bash {project}/scripts/build_wirelog.sh
 """
-environment = { WIRELOG_VERSION = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba", WIRELOG_PREFIX = "$HOME/wirelog-install", WIRELOG_LIB = "$HOME/wirelog-install/lib/libwirelog.1.dylib", DYLD_LIBRARY_PATH = "$HOME/wirelog-install/lib" }
+environment = { WIRELOG_VERSION = "668f82ad69c2bbfc8e8111839302adf1360f55da", WIRELOG_PREFIX = "$HOME/wirelog-install", WIRELOG_LIB = "$HOME/wirelog-install/lib/libwirelog.1.dylib", DYLD_LIBRARY_PATH = "$HOME/wirelog-install/lib" }
 # `delocate` is macOS's auditwheel equivalent — copies the dylib into
 # the wheel and rewrites install names so the bundled copy wins.
 repair-wheel-command = "DYLD_LIBRARY_PATH=$HOME/wirelog-install/lib delocate-wheel --require-archs {delocate_archs} -w {dest_dir} -v {wheel}"
@@ -104,7 +104,7 @@ repair-wheel-command = "DYLD_LIBRARY_PATH=$HOME/wirelog-install/lib delocate-whe
 [tool.cibuildwheel.windows]
 archs = ["AMD64"]
 before-all = "powershell {project}\\scripts\\build_wirelog.ps1"
-environment = { WIRELOG_VERSION = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba", WIRELOG_PREFIX = "C:/wirelog-install", WIRELOG_LIB = "C:/wirelog-install/bin/wirelog-1.dll" }
+environment = { WIRELOG_VERSION = "668f82ad69c2bbfc8e8111839302adf1360f55da", WIRELOG_PREFIX = "C:/wirelog-install", WIRELOG_LIB = "C:/wirelog-install/bin/wirelog-1.dll" }
 # `delvewheel` is the Windows analogue. The bundled DLL ends up in
 # `pyrewire/_lib/` and the loader (#2) finds it ahead of system paths.
 repair-wheel-command = "pip install delvewheel && delvewheel repair -w {dest_dir} --no-mangle-all --add-path C:/wirelog-install/bin {wheel}"
diff --git a/src/pyrewire/__init__.py b/src/pyrewire/__init__.py
index be98cda..dcf6ee4 100644
--- a/src/pyrewire/__init__.py
+++ b/src/pyrewire/__init__.py
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0 OR GPL-3.0-or-later
 """PyreWire - Python wrapper for wirelog declarative dataflow analysis."""
 
-__version__ = "1.0.3"
+__version__ = "1.0.4"
 __author__ = "PyreWire Contributors"
 __license__ = "Apache-2.0 OR GPL-3.0-or-later"
 
diff --git a/tests/docs/test_support_matrix.py b/tests/docs/test_support_matrix.py
index a61eaa4..3d97165 100644
--- a/tests/docs/test_support_matrix.py
+++ b/tests/docs/test_support_matrix.py
@@ -12,7 +12,7 @@
 
 yaml = pytest.importorskip("yaml")
 
-PINNED_WIRELOG_SHA = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba"
+PINNED_WIRELOG_SHA = "668f82ad69c2bbfc8e8111839302adf1360f55da"
 SUPPORTED_PYTHONS = ["3.11", "3.12", "3.13", "3.14"]
 SUPPORTED_CP_TAGS = ["cp311", "cp312", "cp313", "cp314"]
 SUPPORTED_RUNNERS = ["ubuntu-24.04", "macos-15", "windows-2025-vs2026"]
@@ -122,7 +122,7 @@ def test_support_wirelog_bundle_contract_matches_config_and_versioning():
     assert cibw["macos"]["environment"]["WIRELOG_VERSION"] == PINNED_WIRELOG_SHA
     assert cibw["windows"]["environment"]["WIRELOG_VERSION"] == PINNED_WIRELOG_SHA
 
-    assert "wirelog v0.52.0" in support
+    assert "wirelog v0.53.0" in support
     assert PINNED_WIRELOG_SHA in support
     assert "peeled SHA" in support
     assert "Wheels bundle" in versioning
diff --git a/tests/docs/test_versioning_contract.py b/tests/docs/test_versioning_contract.py
index 00ddd21..2c2f467 100644
--- a/tests/docs/test_versioning_contract.py
+++ b/tests/docs/test_versioning_contract.py
@@ -12,12 +12,13 @@
 yaml = pytest.importorskip("yaml")
 
 # The wirelog ref the current release bundles and validates against.
-PINNED_WIRELOG_SHA = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba"
+PINNED_WIRELOG_SHA = "668f82ad69c2bbfc8e8111839302adf1360f55da"
 # Historical pins kept frozen in the compatibility table, one per release.
 WIRELOG_SHA_100 = "272edf3a24b25676f12c4b843d55510f5048dd2f"
 WIRELOG_SHA_101 = "0c6e0cdaee7db069be5d8d896bb59bdcb15673e9"
 WIRELOG_SHA_102 = WIRELOG_SHA_101
-WIRELOG_SHA_103 = PINNED_WIRELOG_SHA
+WIRELOG_SHA_103 = "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba"
+WIRELOG_SHA_104 = PINNED_WIRELOG_SHA
 
 
 def _repo_root() -> Path:
@@ -65,6 +66,16 @@ def test_versioning_documents_103_wirelog_pin_and_runtime_floor():
     assert "peeled tag SHA" in notes
 
 
+def test_versioning_documents_104_wirelog_pin_and_runtime_floor():
+    minimum, validated_ref, notes = _versioning_row("1.0.4")
+
+    assert minimum == "`0.52.0`"
+    assert validated_ref == f"`{WIRELOG_SHA_104}`"
+    assert "v0.53.0" in notes
+    assert "runtime minimum remains `0.52.0`" in notes
+    assert "peeled tag SHA" in notes
+
+
 def test_versioning_explains_sdist_and_wheel_wirelog_behavior():
     text = _read("docs/versioning.md")
 
diff --git a/tests/test_changelog_format.py b/tests/test_changelog_format.py
index 3a11cd4..965dfcc 100644
--- a/tests/test_changelog_format.py
+++ b/tests/test_changelog_format.py
@@ -168,7 +168,11 @@ def test_release_compare_links_are_tag_to_tag():
     changelog = (_repo_root() / "CHANGELOG.md").read_text(encoding="utf-8")
 
     assert (
-        "[Unreleased]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.3...HEAD"
+        "[Unreleased]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.4...HEAD"
+        in changelog
+    )
+    assert (
+        "[1.0.4]: https://github.com/semantic-reasoning/PyreWire/compare/v1.0.3...v1.0.4"
         in changelog
     )
     assert (
diff --git a/tests/test_ci_workflow.py b/tests/test_ci_workflow.py
index 8750076..67c4b3f 100644
--- a/tests/test_ci_workflow.py
+++ b/tests/test_ci_workflow.py
@@ -24,7 +24,7 @@ def _workflow() -> dict[str, Any]:
 def test_ci_default_wirelog_version_is_exact_sha():
     env = _workflow()["jobs"]["test"]["env"]
     default = str(env["WIRELOG_VERSION"])
-    assert "da82a14a7e1472e33aa6ed753b3bc3dfe28a68ba" in default
+    assert "668f82ad69c2bbfc8e8111839302adf1360f55da" in default
 
 
 def test_ci_matrix_drops_python_310():
diff --git a/tests/test_release_metadata.py b/tests/test_release_metadata.py
index 933dbd4..571e1df 100644
--- a/tests/test_release_metadata.py
+++ b/tests/test_release_metadata.py
@@ -28,9 +28,9 @@ def _runtime_version_literal() -> str:
     return match.group(1)
 
 
-def test_project_and_runtime_versions_are_103():
-    assert _pyproject()["project"]["version"] == "1.0.3"
-    assert _runtime_version_literal() == "1.0.3"
+def test_project_and_runtime_versions_are_104():
+    assert _pyproject()["project"]["version"] == "1.0.4"
+    assert _runtime_version_literal() == "1.0.4"
 
 
 def test_project_classifiers_mark_stable_python_311_through_314():