diff --git a/docs/python/conf.py b/docs/python/conf.py
index 7e44670218..3c58d9e7e7 100644
--- a/docs/python/conf.py
+++ b/docs/python/conf.py
@@ -14,7 +14,7 @@ import onnxruntime
 # -- Project information -----------------------------------------------------
 
 project = 'ONNX Runtime'
-copyright = '2018-2019, Microsoft'
+copyright = '2018-2021, Microsoft'
 author = 'Microsoft'
 version = onnxruntime.__version__
 release = version
diff --git a/docs/python/examples/plot_dl_keras.py b/docs/python/examples/plot_dl_keras.py
index 5890307465..949ee895e5 100644
--- a/docs/python/examples/plot_dl_keras.py
+++ b/docs/python/examples/plot_dl_keras.py
@@ -26,7 +26,6 @@ if not os.path.exists('dense121.onnx'):
 
     from keras2onnx import convert_keras
     onx = convert_keras(model, 'dense121.onnx')
-    onx.ir_version = 6
     with open("dense121.onnx", "wb") as f:
         f.write(onx.SerializeToString())
 
diff --git a/docs/python/requirements.txt b/docs/python/requirements.txt
new file mode 100644
index 0000000000..da66f486e8
--- /dev/null
+++ b/docs/python/requirements.txt
@@ -0,0 +1,8 @@
+keras
+keras-onnx
+sphinx
+sphinx-gallery
+pyquickhelper
+tensorflow
+tensorflow-onnx
+
diff --git a/tools/doc/builddoc.bat b/tools/doc/builddoc.bat
new file mode 100644
index 0000000000..75429e716b
--- /dev/null
+++ b/tools/doc/builddoc.bat
@@ -0,0 +1,5 @@
+@echo off
+rem This script must be executed from this folder.
+pip install -r ../../docs/python/requirements.txt
+python -m sphinx -j2 -v -T -b html -d ../../build/docs/_doctrees/html ../../docs/python ../../build/docs/html
+python -u rename_folders.py ../../build/docs/html
diff --git a/tools/doc/builddoc.sh b/tools/doc/builddoc.sh
new file mode 100644
index 0000000000..bd547dc716
--- /dev/null
+++ b/tools/doc/builddoc.sh
@@ -0,0 +1,4 @@
+# This script must be executed from this folder.
+pip install -r ../../docs/python/requirements.txt
+python -m sphinx -j2 -v -T -b html -d ../../build/docs/_doctrees/html ../../docs/python ../../build/docs/html
+python -u rename_folders.py ../../build/docs/html
diff --git a/tools/doc/rename_folders.py b/tools/doc/rename_folders.py
new file mode 100644
index 0000000000..bb3fd854cd
--- /dev/null
+++ b/tools/doc/rename_folders.py
@@ -0,0 +1,81 @@
+"""
+Github publishes the markdown documentation with jekyll enabled.
+This extension does not publish any folder starting with `_`.
+These folders need to be renamed.
+"""
+import os
+import re
+
+
+def rename_folder(root):
+    """
+    Renames all folder starting with `_`.
+    Returns the list of renamed folders.
+    """
+    found = []
+    for r, dirs, files in os.walk(root):
+        for name in dirs:
+            if name.startswith('_'):
+                found.append((r, name))
+    renamed = []
+    for r, name in found:
+        into = name.lstrip('_')
+        renamed.append((r, name, into))
+        full_src = os.path.join(r, name)
+        full_into = os.path.join(r, into)
+        print("rename %r" % full_src)
+        os.rename(full_src, full_into)
+
+    return renamed
+
+
+def replace_files(root, renamed):
+    subs = {r[1]: r[2] for r in renamed}
+    reg = re.compile(
+        "(\\\"[a-zA-Z0-9\\.\\/\\?\\:@\\-_=#]+\\.([a-zA-Z]){2,6}"
+        "([a-zA-Z0-9\\.\\&\\/\\?\\:@\\-_=#])*\\\")")
+
+    for r, dirs, files in os.walk(root):
+        for name in files:
+            if os.path.splitext(name)[-1] != '.html':
+                continue
+            full = os.path.join(r, name)
+            with open(full, "r", encoding="utf-8") as f:
+                content = f.read()
+            find = reg.findall(content)
+            repl = []
+            for f in find:
+                if f[0].startswith("http"):
+                    continue
+                for k, v in subs.items():
+                    if k == v:
+                        raise ValueError("%r == %r" % (k, v))
+                    if ('"%s' % k) in f[0]:
+                        repl.append((f[0], f[0].replace('"%s' % k, '"%s' % v)))
+                    if ('/%s' % k) in f[0]:
+                        repl.append((f[0], f[0].replace('/%s' % k, '/%s' % v)))
+            if len(repl) == 0:
+                continue
+            print("update %r" % full)
+            for k, v in repl:
+                content = content.replace(k, v)
+            with open(full, "w", encoding="utf-8") as f:
+                f.write(content)
+
+
+if __name__ == "__main__":
+    import sys
+    if len(sys.argv) > 1:
+        root = sys.argv[-1]
+    else:
+        root = "../../build/docs/html"
+    print('look into %r' % root)
+    ren = rename_folder(root)
+    if len(ren) == 0:
+        ren = [('', '_static', 'static'),
+               ('', '_images', 'images'),
+               ('', '_downloads', 'downloads'),
+               ('', '_sources', 'sources'),
+               ('', '_modules', 'modules')]
+    replace_files(root, ren)
+    print('done.')