diff --git a/pyproject.toml b/pyproject.toml
index aacd5af2..a3550c58 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,7 +62,7 @@ pytest-benchmark = "*"
 
 [tool.poetry.group.docs.dependencies]
 myst-nb = "^0.17.0"
-sphinx-rtd-theme = "^1.2.0"
+sphinx-rtd-theme = ">=1.2,<3.0"
 sphinx-autodoc-typehints = "^1.23.0"
 sphinx-autodocgen = "^1.3"
 jupytext = "^1.14.5"
@@ -82,7 +82,7 @@ pandas-stubs = "<3"
 
 [tool.poetry.group.notebooks.dependencies]
 myst-nb = "^0.17.0"
-sphinx-rtd-theme = "^1.2.0"
+sphinx-rtd-theme = ">=1.2,<3.0"
 sphinx-autodoc-typehints = "^1.23.0"
 sphinx-autodocgen = "^1.3"
 jupytext = "^1.14.5"