diff --git a/pyproject.toml b/pyproject.toml
index 605d4d6ec..863645ddf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,38 +51,32 @@ pytest-cov = { version = ">=5.0.0", optional = true }
 codecov = { version = ">=2.1.0", optional = true }
 pytest_cases = { version = ">=3.0.0", optional = true }
 
+# Optional dependencies for documentation
+sphinx = { version = "^5.3.0", optional = true }
+sphinx-gallery = { version = "^0.11.1", optional = true }
+sphinx-bootstrap-theme = { version = "^0.8.1", optional = true }
+pydata-sphinx-theme = { version = "^0.13.2", optional = true }
+numpydoc = { version = "^1.5.0", optional = true }
+m2r2 = { version = "^0.3.0", optional = true }
+sphinx-design = { version = "^0.3.0", optional = true }
+sphinx-rtd-theme = { version = "^1.2.0", optional = true }
+sphinx_copybutton = { version = "^0.4.0", optional = true }
+sphinxcontrib-bibtex = { version = "^2.2.0", optional = true }
+sphinx-favicon = { version = "^1.0.1", optional = true }
+tdlda = { git = "https://github.com/jsosulski/tdlda.git", rev = "0.1.0", optional = true}
+
 
 [tool.poetry.extras]
 carbonemission = ["codecarbon"]
 deeplearning = ["tensorflow", "keras", "scikeras", "braindecode", "docstring_inheritance", "torch", "libclang"]
 optuna = ["optuna", "optuna-integration"]
 tests = ["pytest", "pytest-cov", "codecov", "pytest_cases"]
-
-[tool.poetry.group.docs]
-optional = true
-
-
-[tool.poetry.group.docs.dependencies]
-Sphinx = "^5.3.0"
-sphinx-gallery = "^0.11.1"
-sphinx-bootstrap-theme = "^0.8.1"
-pydata-sphinx-theme = "^0.13.2"
-numpydoc = "^1.5.0"
-pre-commit = "^2.21.0"
-m2r2 = "^0.3.0"
-tdlda = { git = "https://github.com/jsosulski/tdlda.git", rev = "0.1.0" }
-sphinx-design = "^0.3.0"
-sphinx-rtd-theme = "^1.2.0"
-sphinx_copybutton = "^0.4.0"
-sphinxcontrib-bibtex = "^2.2.0"
-sphinx-favicon = "^1.0.1"
-
+docs = ["Sphinx", "sphinx-gallery", "sphinx-bootstrap-theme", "pydata-sphinx-theme", "numpydoc", "pre-commit", "m2r2", "tdlda", "sphinx-design", "sphinx-rtd-theme", "sphinx_copybutton", "sphinxcontrib-bibtex", "sphinx-favicon"]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
-
 [tool.black]
 line-length = 90
 target-version = ["py38"]