CI: pin sphinx <= 3.1.1 for autodoc failure (pandas-dev#35139)

jorisvandenbossche · web-flow · commit fdaa5e4f35dd · 2020-07-06T09:30:35.000-05:00
diff --git a/environment.yml b/environment.yml
@@ -27,7 +27,7 @@ dependencies:
   # documentation
   - gitpython  # obtain contributors from git for whatsnew
   - gitdb2=2.0.6  # GH-32060
-  - sphinx
+  - sphinx<=3.1.1
 
   # documentation (jupyter notebooks)
   - nbconvert>=5.4.1
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -16,7 +16,7 @@ mypy==0.730
 pycodestyle
 gitpython
 gitdb2==2.0.6
-sphinx
+sphinx<=3.1.1
 nbconvert>=5.4.1
 nbsphinx
 pandoc
