diff --git a/pyproject.toml b/pyproject.toml
index d7d6822..fa913c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,10 +45,10 @@ optional-dependencies.dev = [
   "webdav4[docs,fsspec,http2,qa,tests]",
 ]
 optional-dependencies.docs = [
-  "furo==2022.12.7",
-  "myst-parser==0.18.1",
-  "sphinx==5.3",
-  "sphinx-copybutton==0.5.1",
+  "furo==2024.5.6",
+  "myst-parser>=3,<4",
+  "sphinx>=7,<8",
+  "sphinx-copybutton==0.5.2",
 ]
 optional-dependencies.fsspec = [
   # when changing lower-bound, keep `lower-bound` env dependencies up-to-date.