diff --git a/doc/README.md b/doc/README.md
index 98978a268..6129be5e2 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -5,6 +5,7 @@ Note that Ray must be installed first.
 
 ```
 pip install -r requirements-doc.txt
+pip install -U -r requirements-rtd.txt # important for reproducing the deployment environment
 make html
 open _build/html/index.html
 ```
diff --git a/doc/source/cluster/index.rst b/doc/source/cluster/index.rst
index 747c95b93..aa341bb6a 100644
--- a/doc/source/cluster/index.rst
+++ b/doc/source/cluster/index.rst
@@ -3,7 +3,7 @@
 Distributed Ray Overview
 ========================
 
-One of Ray's strengths is the ability to leverage multiple machines in the same program Ray can, of course, be run on a single machine (and is done so often) but the real power is using Ray on a cluster of machines.
+One of Ray's strengths is the ability to leverage multiple machines in the same program. Ray can, of course, be run on a single machine (and is done so often) but the real power is using Ray on a cluster of machines.
 
 Key Concepts
 ------------