Close #9807: Restrict docutils to 0.17.x or older

CHANGES

@@ -4,6 +4,8 @@ Release 2.4.5 (in development)
 Dependencies
 ------------
 
+* #9807: Restrict docutils to 0.17.x or older
+
 Incompatible changes
 --------------------
 

setup.py

@@ -23,7 +23,7 @@ install_requires = [
     'sphinxcontrib-qthelp',
     'Jinja2>=2.3',
     'Pygments>=2.0',
-    'docutils>=0.12',
+    'docutils>=0.12,<0.18',
     'snowballstemmer>=1.1',
     'babel>=1.3,!=2.0',
     'alabaster>=0.7,<0.8',