Downgrade commonmark to 0.5.5

In 6.x changelog > DocParser has been renamed to Parser. https://github.com/rtfd/CommonMark-py/releases/tag/0.6.0 and that it's not compatible with the latest version of recommonmark (0.4.0)
readthedocs · Jan 24, 2018 · 5b18aac · 5b18aac
1 parent d8785c5
commit 5b18aac
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/requirements/pip.txt b/requirements/pip.txt
@@ -68,7 +68,11 @@ djangorestframework-jsonp==1.0.2
 
 # Docs
 sphinxcontrib-httpdomain==1.5.0
-commonmark==0.7.4
+
+# commonmark 0.5.5 is the latest version compatible with our docs, the
+# newer ones make `tox -e docs` to fail
+commonmark==0.5.5
+
 recommonmark==0.4.0
 
 # Version comparison stuff