diff --git a/pyproject.toml b/pyproject.toml
index ac27e69..d4281d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ doc = [
   'sphinx-issues',
   'sphinx>=9.0',
   'sphinxcontrib-bibtex',
-  'sphinxcontrib-pydantic>=0.3.0',
+  'sphinxcontrib-pydantic>=0.4.0',
 ]
 ide = [
   'ipykernel',
diff --git a/uv.lock b/uv.lock
index 8f6f409..fae99b5 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2034,7 +2034,7 @@ wheels = [
 
 [[package]]
 name = "sphinxcontrib-pydantic"
-version = "0.3.0"
+version = "0.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "docutils" },
@@ -2044,9 +2044,9 @@ dependencies = [
     { name = "sphinx", version = "9.0.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.12'" },
     { name = "sphinx", version = "9.1.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.12'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f2/b0/9b82524553b93b22cfcea0fc60fe013a6d4e72fbc8f151149898761fa7f4/sphinxcontrib_pydantic-0.3.0.tar.gz", hash = "sha256:9f55d7dfd48b5b58f7a78f22eae5a4ad557f9ee588fa3a2dd0f906f3677f276f", size = 199440, upload-time = "2026-04-22T17:15:04.023Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/03/1b/2b610e271a0a32a6cfb07b395220038d771871d1f98cd292d2a4ce1e2112/sphinxcontrib_pydantic-0.4.0.tar.gz", hash = "sha256:4d717b6327dd030e9803efeb348cbc084ac4b2c54d007bd2cb4936b21180db34", size = 204003, upload-time = "2026-06-16T11:33:27.283Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/76/85/2ca2c74b79e72a798ebb3e857ba3bf66f20f0d4e1093df0a8f30f065572f/sphinxcontrib_pydantic-0.3.0-py3-none-any.whl", hash = "sha256:68831ed9f2013a2270a4445b743b5fbcf042abfa1e7b45539d74cd96de4a2ba8", size = 32396, upload-time = "2026-04-22T17:15:02.855Z" },
+    { url = "https://files.pythonhosted.org/packages/df/45/fdee30bf797ac39143f15f86d677601d5897a4b1f63d8ebd0af6bc1f86ec/sphinxcontrib_pydantic-0.4.0-py3-none-any.whl", hash = "sha256:557d4b44f5df4b0d99c3ea47c826e6da3d519f57115405b51a9921c4d4ccbda2", size = 34517, upload-time = "2026-06-16T11:33:28.338Z" },
 ]
 
 [[package]]
@@ -2148,7 +2148,7 @@ doc = [
     { name = "sphinx-gallery" },
     { name = "sphinx-issues" },
     { name = "sphinxcontrib-bibtex" },
-    { name = "sphinxcontrib-pydantic", specifier = ">=0.3.0" },
+    { name = "sphinxcontrib-pydantic", specifier = ">=0.4.0" },
 ]
 ide = [
     { name = "ipykernel" },