diff --git a/requirements/edx/base.in b/requirements/edx/base.in
index e9ed2bed1e..dd331f1be0 100644
--- a/requirements/edx/base.in
+++ b/requirements/edx/base.in
@@ -100,7 +100,7 @@ help-tokens
 html5lib                            # HTML parser, used for capa problems
 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)
+mailsnake                           # 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
 mongoengine==0.10.0                 # Object-document mapper for MongoDB, used in the LMS dashboard
diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index 8d02e55d51..a7323c2b5d 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -160,7 +160,7 @@ lepl==5.1.3               # via rfc6266-parser
 libsass==0.10.0
 loremipsum==1.0.5
 lxml==3.8.0
-mailsnake==1.6.2
+mailsnake==1.6.4
 mako==1.0.2
 markdown==2.6.11
 markey==0.8               # via django-babel-underscore
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index fa85990ec4..110b3d35a6 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -202,7 +202,7 @@ libsass==0.10.0
 linecache2==1.0.0
 loremipsum==1.0.5
 lxml==3.8.0
-mailsnake==1.6.2
+mailsnake==1.6.4
 mako==1.0.2
 mando==0.6.4
 markdown==2.6.11
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index 0fac0cfa97..35b1f1012e 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -195,7 +195,7 @@ libsass==0.10.0
 linecache2==1.0.0         # via traceback2
 loremipsum==1.0.5
 lxml==3.8.0
-mailsnake==1.6.2
+mailsnake==1.6.4
 mako==1.0.2
 mando==0.6.4              # via radon
 markdown==2.6.11