diff --git a/pkgs/development/python-modules/sphinx-toolbox/default.nix b/pkgs/development/python-modules/sphinx-toolbox/default.nix
index 82328a7efd23..69cb830d922e 100644
--- a/pkgs/development/python-modules/sphinx-toolbox/default.nix
+++ b/pkgs/development/python-modules/sphinx-toolbox/default.nix
@@ -35,7 +35,8 @@ buildPythonPackage (finalAttrs: {
   postPatch = ''
     substituteInPlace \
       requirements.txt PKG-INFO pyproject.toml \
-      --replace-fail "sphinx-tabs<3.4.7,>=1.2.1" "sphinx-tabs<=3.4.7,>=1.2.1"
+      --replace-fail "sphinx-tabs<3.4.7,>=1.2.1" "sphinx-tabs<=3.5.0,>=1.2.1" \
+      --replace-fail "ruamel.yaml<=0.18.16,>=0.16.12" "ruamel.yaml<=0.19.1,>=0.16.12"
   '';
 
   build-system = [ whey ];