diff --git a/pyproject.toml b/pyproject.toml
index 3a0c91f2c99d..6cab77d13f17 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -361,17 +361,6 @@ towncrier = ">=18.6.0rc1"
 tomli = ">=1.2.3"
 
 
-# Dependencies for building the development documentation
-[tool.poetry.group.dev-docs]
-optional = true
-
-[tool.poetry.group.dev-docs.dependencies]
-sphinx = {version = "^6.1", python = "^3.8"}
-sphinx-autodoc2 = {version = ">=0.4.2,<0.6.0", python = "^3.8"}
-myst-parser = {version = "^1.0.0", python = "^3.8"}
-furo = ">=2022.12.7,<2024.0.0"
-
-
 [build-system]
 # The upper bounds here are defensive, intended to prevent situations like
 # https://github.com/matrix-org/synapse/issues/13849 and
@@ -379,7 +368,7 @@ furo = ">=2022.12.7,<2024.0.0"
 # runtime errors caused by build system changes.
 # We are happy to raise these upper bounds upon request,
 # provided we check that it's safe to do so (i.e. that CI passes).
-requires = ["poetry-core>=1.1.0,<=1.8.1", "setuptools_rust>=1.3,<=1.8.1"]
+requires = ["poetry-core>=1.0.0,<=1.8.1", "setuptools_rust>=1.3,<=1.8.1"]
 build-backend = "poetry.core.masonry.api"