diff --git a/cms/envs/common.py b/cms/envs/common.py
index c753a7031d..9bd7b71ef0 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -977,15 +977,14 @@ ADVANCED_COMPONENT_TYPES = [
     'pb-dashboard',
     'poll',
     'survey',
-    # XBlocks from pmitros repos are prototypes. They should not be used
-    # except for edX Learning Sciences experiments on edge.edx.org without
-    # further work to make them robust, maintainable, finalize data formats,
-    # etc.
+    # Some of the XBlocks from pmitros repos are sometimes prototypes.
+    # Use with caution.
     'concept',  # Concept mapper. See https://github.com/pmitros/ConceptXBlock
     'done',  # Lets students mark things as done. See https://github.com/pmitros/DoneXBlock
     'audio',  # Embed an audio file. See https://github.com/pmitros/AudioXBlock
     'recommender',  # Crowdsourced recommender. Prototype by dli&pmitros. Intended for roll-out in one place in one course.
     'profile',  # Prototype user profile XBlock. Used to test XBlock parameter passing. See https://github.com/pmitros/ProfileXBlock
+    'rate',  # Allows up-down voting of course content. See https://github.com/pmitros/RateXBlock
 
     'split_test',
     'combinedopenended',
diff --git a/requirements/edx/github.txt b/requirements/edx/github.txt
index e8e722a80f..2add8c240d 100644
--- a/requirements/edx/github.txt
+++ b/requirements/edx/github.txt
@@ -48,6 +48,7 @@ git+https://github.com/edx/i18n-tools.git@v0.1.3#egg=i18n-tools==v0.1.3
 git+https://github.com/edx/edx-oauth2-provider.git@0.5.7#egg=oauth2-provider==0.5.7
 -e git+https://github.com/edx/edx-val.git@0.0.6#egg=edx-val
 -e git+https://github.com/pmitros/RecommenderXBlock.git@518234bc354edbfc2651b9e534ddb54f96080779#egg=recommender-xblock
+-e git+https://github.com/pmitros/RateXBlock.git@367e19c0f6eac8a5f002fd0f1559555f8e74bfff#egg=rate-xblock
 -e git+https://github.com/edx/edx-search.git@release-2015-09-11a#egg=edx-search
 git+https://github.com/edx/edx-milestones.git@release-2015-10-20#egg=edx-milestones==0.1.3
 git+https://github.com/edx/edx-lint.git@v0.3.0#egg=edx_lint==0.3.0