Add Sphinx to requirements for building graphene docs

nattyait · nattyait · commit e405a20e3dad · 2017-03-01T16:11:04.000+07:00
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -1,2 +1,4 @@
+# Required library
+Sphinx==1.5.3
 # Docs template
 https://github.com/graphql-python/graphene-python.org/archive/docs.zip
