message: fixed doc build
diff: @@ -23,16 +23,16 @@ restructuredtext-lint==1.1.2
  singledispatch==3.4.0.3
  six==1.11.0
  snowballstemmer==1.2.1
  -Sphinx==1.6.6
  -sphinx-autobuild==0.7.1
  -sphinx-intl==0.9.11
  -sphinx-rtd-theme==0.4.2
  -sphinxcontrib-websupport==1.0.1
  +Sphinx
  +sphinx-autobuild
  +sphinx-intl
  +sphinx-rtd-theme
  +sphinxcontrib-websupport
  tornado==4.5.3
  typing==3.6.2
  urllib3==1.24.2
  watchdog==0.8.3
  yarg==0.1.9
  -m2r
  +m2r2
  pygments-lexer-solidity
  sphinxext-remoteliteralinclude
  \ No newline at end of file
  