diff --git a/dev/env-py38.yaml b/dev/env-py38.yaml
index 760d2f97..44fccb5a 100644
--- a/dev/env-py38.yaml
+++ b/dev/env-py38.yaml
@@ -17,6 +17,7 @@ dependencies:
   - numpy
   - onnxruntime
   - packaging>=17.0
+  - pdoc
   - pip
   - pre-commit
   - psutil
diff --git a/dev/env-tf.yaml b/dev/env-tf.yaml
index d51c5ad3..56d78c2b 100644
--- a/dev/env-tf.yaml
+++ b/dev/env-tf.yaml
@@ -17,6 +17,7 @@ dependencies:
   - numpy
   - onnxruntime
   - packaging>=17.0
+  - pdoc
   - pip
   - pre-commit
   - psutil
diff --git a/dev/env-wo-python.yaml b/dev/env-wo-python.yaml
index fedd86d3..e441df63 100644
--- a/dev/env-wo-python.yaml
+++ b/dev/env-wo-python.yaml
@@ -17,6 +17,7 @@ dependencies:
   - numpy
   - onnxruntime
   - packaging>=17.0
+  - pdoc
   - pip
   - pre-commit
   - psutil
diff --git a/dev/env.yaml b/dev/env.yaml
index 4ac24ecf..a403e9f6 100644
--- a/dev/env.yaml
+++ b/dev/env.yaml
@@ -16,6 +16,7 @@ dependencies:
   - numpy
   - onnxruntime
   - packaging>=17.0
+  - pdoc
   - pip
   - pre-commit
   - psutil
diff --git a/setup.py b/setup.py
index 72a4bce4..9a479271 100644
--- a/setup.py
+++ b/setup.py
@@ -57,6 +57,7 @@
             "onnxruntime",
             "packaging>=17.0",
             "pre-commit",
+            "pdoc",
             "psutil",  # parallel pytest with 'pytest -n auto'
             "pyright",
             "pytest-xdist",  # parallel pytest