diff --git a/docs/_ext/djangodocs.py b/docs/_ext/djangodocs.py
index 4e97ad7ab0..cce682e7b7 100644
--- a/docs/_ext/djangodocs.py
+++ b/docs/_ext/djangodocs.py
@@ -63,6 +63,7 @@ def setup(app):
                  man=(visit_snippet_literal, depart_snippet_literal),
                  text=(visit_snippet_literal, depart_snippet_literal),
                  texinfo=(visit_snippet_literal, depart_snippet_literal))
+    return {'parallel_read_safe': True}
 
 
 class snippet_with_filename(nodes.literal_block):
diff --git a/docs/_ext/ticket_role.py b/docs/_ext/ticket_role.py
index b53778558e..809b4239b2 100644
--- a/docs/_ext/ticket_role.py
+++ b/docs/_ext/ticket_role.py
@@ -36,3 +36,4 @@ def ticket_role(name, rawtext, text, lineno, inliner, options=None, content=None
 def setup(app):
     app.add_config_value('ticket_url', None, 'env')
     app.add_role('ticket', ticket_role)
+    return {'parallel_read_safe': True}