diff --git a/poetry.lock b/poetry.lock
index 59fe3c2..5903926 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1597,14 +1597,14 @@ test = ["cython (>=3.0)", "defusedxml (>=0.7.1)", "pytest (>=8.0)", "setuptools
 
 [[package]]
 name = "sphinx-immaterial"
-version = "0.11.14"
+version = "0.12.5"
 description = "Adaptation of mkdocs-material theme for the Sphinx documentation system"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 groups = ["docs"]
 files = [
-    {file = "sphinx_immaterial-0.11.14-py3-none-any.whl", hash = "sha256:dd1a30614c8ecaa931155189e7d54f211232e31cf3e5c6d28ba9f04a4817f0a3"},
-    {file = "sphinx_immaterial-0.11.14.tar.gz", hash = "sha256:e1e8ba93c78a3e007743fede01a3be43f5ae97c5cc19b8e2a4d2aa058abead61"},
+    {file = "sphinx_immaterial-0.12.5-py3-none-any.whl", hash = "sha256:4173b22ad343fd9c75b51baf305851d89b98b94603c474b428e30e8c8476673b"},
+    {file = "sphinx_immaterial-0.12.5.tar.gz", hash = "sha256:a7c0c4be3dcb4960eb7b299dfee07cdf8a02bf56821f5d0d62e5d31b7b7b5ec5"},
 ]
 
 [package.dependencies]
@@ -1617,6 +1617,7 @@ sphinx = ">=4.5"
 typing-extensions = "*"
 
 [package.extras]
+black = ["black"]
 clang-format = ["clang-format"]
 cpp = ["libclang"]
 json = ["pyyaml"]
@@ -1888,4 +1889,4 @@ docs = []
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.9.0"
-content-hash = "a2ee217769b1d5cb2f51e1bd46836dc174cbebea5d710eeb3c09198c91f7267f"
+content-hash = "27d9ece6cbd06df707419ed7b67c143176f9c3ff3124347924a63d6ac8fe4602"
diff --git a/pyproject.toml b/pyproject.toml
index ceb9605..ec02457 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,7 +82,7 @@ openapi-spec-validator = "openapi_spec_validator.__main__:main"
 
 [tool.poetry.group.docs.dependencies]
 sphinx = ">=5.3,<8.0"
-sphinx-immaterial = "^0.11.0"
+sphinx-immaterial = ">=0.11,<0.13"
 
 [tool.pytest.ini_options]
 addopts = """