diff --git a/requirements/edx/base.in b/requirements/edx/base.in
index f177044a1c..ebe071b423 100644
--- a/requirements/edx/base.in
+++ b/requirements/edx/base.in
@@ -99,7 +99,7 @@ ipaddr==2.1.11                      # Ip network support for Embargo feature
 jsonfield                           # Django model field for validated JSON; used in several apps
 mailsnake==1.6.2                    # Needed for mailchimp (mailing djangoapp)
 mako==1.0.2                         # Primary template language used for server-side page rendering
-Markdown                            # Convert text markup to HTML; used in capa problems, forums, and course wikis
+Markdown==2.6.11                    # Convert text markup to HTML; used in capa problems, forums, and course wikis; pin Markdown version as tests failed for its upgrade to latest release
 mongoengine==0.10.0                 # Object-document mapper for MongoDB, used in the LMS dashboard
 MySQL-python                        # Driver for the default production relational database
 newrelic                            # New Relic agent for performance monitoring
diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index 9d95a16fcf..8fa53ce5e6 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -163,7 +163,7 @@ loremipsum==1.0.5
 lxml==3.8.0
 mailsnake==1.6.2
 mako==1.0.2
-markdown==3.0.1
+markdown==2.6.11
 markey==0.8               # via django-babel-underscore
 markupsafe==1.0
 mock==1.0.1
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index c7ed114fbb..f9fb8e0860 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -207,7 +207,7 @@ lxml==3.8.0
 mailsnake==1.6.2
 mako==1.0.2
 mando==0.6.4
-markdown==3.0.1
+markdown==2.6.11
 markey==0.8
 markupsafe==1.0
 mccabe==0.6.1
@@ -328,7 +328,7 @@ toml==0.10.0
 tox-battery==0.5.1
 tox==3.5.2
 traceback2==1.4.0
-transifex-client==0.13.4
+transifex-client==0.13.5
 twisted==16.6.0
 typing==3.6.6             # via sphinx
 unicodecsv==0.14.1
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index fb8a3fe3eb..dd375ddffd 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -200,7 +200,7 @@ lxml==3.8.0
 mailsnake==1.6.2
 mako==1.0.2
 mando==0.6.4              # via radon
-markdown==3.0.1
+markdown==2.6.11
 markey==0.8
 markupsafe==1.0
 mccabe==0.6.1             # via flake8, pylint
@@ -313,7 +313,7 @@ toml==0.10.0              # via tox
 tox-battery==0.5.1
 tox==3.5.2
 traceback2==1.4.0         # via testtools, unittest2
-transifex-client==0.13.4
+transifex-client==0.13.5
 twisted==16.6.0           # via pa11ycrawler, scrapy
 unicodecsv==0.14.1
 unidecode==1.0.22         # via python-slugify