diff --git a/.travis b/.travis
index 9c7f3ca37..74e968928 160000
--- a/.travis
+++ b/.travis
@@ -1 +1 @@
-Subproject commit 9c7f3ca37d018a69325b37874b424ded12cd4811
+Subproject commit 74e968928601f613b2cec821c1a5975baafc1127
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 1cf235cb0..e83e241e7 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,4 @@
-sphinx
-sphinx-autobuild
-recommonmark
+recommonmark==0.5.0
+Sphinx==1.8.4
+sphinx-markdown-tables==0.0.9
+sphinx_rtd_theme==0.4.3