diff --git a/pixi.lock b/pixi.lock
index 7272b73..7021eeb 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -633,8 +633,8 @@ environments:
       - conda: https://prefix.dev/conda-forge/noarch/websocket-client-1.9.2-pyhd8ed1ab_0.conda
       - conda: https://prefix.dev/conda-forge/noarch/zipp-4.1.0-pyhcf101f3_0.conda
       - conda: https://prefix.dev/ship/linux-64/mp-units-2.5.0-hb0f4dca_5.conda
-      - pypi: https://files.pythonhosted.org/packages/62/e6/5cd908c8a2caa47fdb0543d6dbc8655b78a53b83514819d66e7f71ecee16/gersemi-0.28.1-cp314-cp314-manylinux_2_28_x86_64.whl
       - pypi: https://files.pythonhosted.org/packages/66/65/08d3a5039b565231c501b31d1a973d4222e9803c03b2c31a9c08bdec3e30/cpplint-2.0.2-py3-none-any.whl
+      - pypi: https://files.pythonhosted.org/packages/87/ef/dcfaf0d78cf3684575fcdacd9213ce1d9d1bf98b9c194f891d0fe94dcda6/gersemi-0.29.1-cp314-cp314-manylinux_2_28_x86_64.whl
 packages:
 - conda: https://prefix.dev/conda-forge/linux-64/_openmp_mutex-4.5-8_kmp_llvm.conda
   build_number: 8
@@ -3247,7 +3247,7 @@ packages:
   - python_abi 3.14.* *_cp314
   license: MIT
   purls:
-  - pkg:pypi/ruamel-yaml-clib?source=compressed-mapping
+  - pkg:pypi/ruamel-yaml-clib?source=hash-mapping
   run_exports: {}
   size: 160100
   timestamp: 1788170277419
@@ -5960,13 +5960,6 @@ packages:
     - mp-units >=2.5.0,<2.6.0a0
   size: 110217
   timestamp: 1781445240307
-- pypi: https://files.pythonhosted.org/packages/62/e6/5cd908c8a2caa47fdb0543d6dbc8655b78a53b83514819d66e7f71ecee16/gersemi-0.28.1-cp314-cp314-manylinux_2_28_x86_64.whl
-  name: gersemi
-  version: 0.28.1
-  sha256: 065cf4bc6c9b72f0fe9f0f3da4e2e4fdb97bf3bd419059599241d5e155cde262
-  requires_dist:
-  - pyyaml>=5,<7
-  requires_python: '>=3.8'
 - pypi: https://files.pythonhosted.org/packages/66/65/08d3a5039b565231c501b31d1a973d4222e9803c03b2c31a9c08bdec3e30/cpplint-2.0.2-py3-none-any.whl
   name: cpplint
   version: 2.0.2
@@ -5980,3 +5973,10 @@ packages:
   - testfixtures ; extra == 'dev'
   - tox<5 ; extra == 'dev'
   requires_python: '>=3.9'
+- pypi: https://files.pythonhosted.org/packages/87/ef/dcfaf0d78cf3684575fcdacd9213ce1d9d1bf98b9c194f891d0fe94dcda6/gersemi-0.29.1-cp314-cp314-manylinux_2_28_x86_64.whl
+  name: gersemi
+  version: 0.29.1
+  sha256: 014edec25c5162ca3ef0d2cc5699b37de27cfa7455e74accd85dae94dd9e3b3d
+  requires_dist:
+  - pyyaml>=5,<7
+  requires_python: '>=3.8'
diff --git a/pixi.toml b/pixi.toml
index f0a770a..14a8f27 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -83,7 +83,7 @@ commitizen = "*"
 # (the version used by the other SHiP repos; data-model previously pinned 0.17.1).
 [feature.lint.pypi-dependencies]
 cpplint = "==2.0.2"
-gersemi = "==0.28.1"
+gersemi = "==0.29.1"
 
 [feature.lint.tasks]
 lint = "prek run --all-files"