diff --git a/cuda_bindings/pixi.toml b/cuda_bindings/pixi.toml
index 9d122d17413..ea516ea9d21 100644
--- a/cuda_bindings/pixi.toml
+++ b/cuda_bindings/pixi.toml
@@ -39,9 +39,8 @@ pip = "*"
 pydata-sphinx-theme = "*"
 pytest = "*"
 scipy = "*"
-sphinx = "<8.2.0"
+sphinx = ">=9,<10"
 sphinx-copybutton = "*"
-sphinx-toolbox = "*"
 
 [feature.cython-tests.dependencies]
 cython = ">=3.2.5,<3.3" # for tests that exercise APIs from cython
@@ -86,6 +85,7 @@ docs = { features = ["cu13", "docs"], solve-group = "docs" }
 
 [feature.docs.pypi-dependencies]
 nvidia-sphinx-theme = "*"
+sphinx-toolbox = ">=4.2.0"
 
 # TODO: check if these can be extracted from pyproject.toml
 [package]
diff --git a/cuda_core/pixi.toml b/cuda_core/pixi.toml
index b2c6a3389c3..e6dfe620cd1 100644
--- a/cuda_core/pixi.toml
+++ b/cuda_core/pixi.toml
@@ -105,15 +105,15 @@ pip = "*"
 pydata-sphinx-theme = "*"
 pytest = "*"
 scipy = "*"
-sphinx = "<8.2.0"
+sphinx = ">=9,<10"
 sphinx-copybutton = "*"
 myst-nb = "*"
 enum_tools = "*"
-sphinx-toolbox = "*"
 pyclibrary = "*"
 
 [feature.docs.pypi-dependencies]
 nvidia-sphinx-theme = "*"
+sphinx-toolbox = ">=4.2.0"
 
 [feature.docs.target.linux.dependencies]
 make = "*"
diff --git a/cuda_pathfinder/pixi.toml b/cuda_pathfinder/pixi.toml
index c38c08c3f2e..41e41bdd265 100644
--- a/cuda_pathfinder/pixi.toml
+++ b/cuda_pathfinder/pixi.toml
@@ -31,9 +31,8 @@ pyclibrary = "*"
 pydata-sphinx-theme = "*"
 pytest = "*"
 scipy = "*"
-sphinx = "<8.2.0"
+sphinx = ">=9,<10"
 sphinx-copybutton = "*"
-sphinx-toolbox = "*"
 
 [feature.cu12.system-requirements]
 cuda = "12"
@@ -55,6 +54,7 @@ docs = { features = ["docs"], solve-group = "docs" }
 
 [feature.docs.pypi-dependencies]
 nvidia-sphinx-theme = "*"
+sphinx-toolbox = ">=4.2.0"
 
 # TODO: check if these can be extracted from pyproject.toml
 [package]
diff --git a/cuda_python/docs/environment-docs.yml b/cuda_python/docs/environment-docs.yml
index 3152f0a3a93..a40df63307d 100644
--- a/cuda_python/docs/environment-docs.yml
+++ b/cuda_python/docs/environment-docs.yml
@@ -15,11 +15,11 @@ dependencies:
   - pydata-sphinx-theme
   - pytest
   - scipy
-  - sphinx <8.2.0
+  - sphinx >=9,<10
   - sphinx-copybutton
   - myst-nb
   - enum_tools
-  - sphinx-toolbox
   - pyclibrary
   - pip:
     - nvidia-sphinx-theme
+    - sphinx-toolbox>=4.2.0
diff --git a/toolshed/setup-docs-env.sh b/toolshed/setup-docs-env.sh
index 9acbaa8e391..1c717010085 100755
--- a/toolshed/setup-docs-env.sh
+++ b/toolshed/setup-docs-env.sh
@@ -47,7 +47,7 @@ conda create -y -n "${ENV_NAME}" \
     pydata-sphinx-theme \
     pytest \
     scipy \
-    "sphinx<8.2.0" \
+    "sphinx>=9,<10" \
     sphinx-copybutton \
     myst-nb \
     enum_tools \
@@ -56,7 +56,7 @@ conda create -y -n "${ENV_NAME}" \
 
 conda activate "${ENV_NAME}"
 python -m pip install --upgrade pip
-python -m pip install nvidia-sphinx-theme
+python -m pip install nvidia-sphinx-theme "sphinx-toolbox>=4.2.0"
 
 echo
 echo "✅ Environment '${ENV_NAME}' is ready."