diff --git a/_config.yml b/_config.yml
index 05932211..cf830b7b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -18,6 +18,7 @@ minimal_mistakes_skin    : "default" # "air", "aqua", "contrast", "dark", "dirt"
 locale                   : "en-US"
 title                    : "Site Title"
 title_separator          : "-"
+subtitle                 : # site tagline that appears below site title in masthead
 name                     : "Your Name"
 description              : "An amazing website."
 url                      : # the base hostname & protocol for your site e.g. "https://mmistakes.github.io"
diff --git a/docs/_config.yml b/docs/_config.yml
index 7877fed0..c3e57a22 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -13,6 +13,7 @@ minimal_mistakes_skin    : "default" # "air", "aqua", "contrast", "dark", "dirt"
 locale                   : "en-US"
 title                    : "Minimal Mistakes"
 title_separator          : "-"
+subtitle                 : # site tagline that appears below site title in masthead
 name                     : &name "Michael Rose" # &name is a YAML anchor which can be *referenced later
 description              : &description "A flexible Jekyll theme for your blog or site with a minimalist aesthetic."
 url                      : https://mmistakes.github.io # the base hostname & protocol for your site e.g. "https://mmistakes.github.io"
diff --git a/docs/_docs/05-configuration.md b/docs/_docs/05-configuration.md
index 33880ff1..4d07f33a 100644
--- a/docs/_docs/05-configuration.md
+++ b/docs/_docs/05-configuration.md
@@ -2,7 +2,7 @@
 title: "Configuration"
 permalink: /docs/configuration/
 excerpt: "Settings for configuring and customizing the theme."
-last_modified_at: 2019-01-15T08:31:44-05:00
+last_modified_at: 2019-07-17T11:50:08-04:00
 toc: true
 ---
 
@@ -134,6 +134,12 @@ _Example:_ `title_separator: "|"` would produce page titles like `Sample Page |
 **Note:** Long site titles have been known to break the masthead layout. Avoid adding a long "tagline" to the title prevent this from happening eg. `My Awesome Site is the Best Because I Say So".
 {: .notice--warning}
 
+### Site subtitle
+
+A short tagline that appears below the title in site masthead.
+
+_Example:_ `subtitle: "Version 2.0"`
+
 ### Site name
 
 Used to assign a site author. Don't worry, you can override the site author with different ones on specific posts, pages, or collection documents.
diff --git a/test/_config.yml b/test/_config.yml
index 3609159d..2ec5de3e 100644
--- a/test/_config.yml
+++ b/test/_config.yml
@@ -10,8 +10,9 @@ minimal_mistakes_skin    : "default" # "air", "aqua", "contrast", "dark", "dirt"
 
 # Site Settings
 locale                   : "en-US"
-title                    : "Minimal Mistakes Development Test Site"
+title                    : "Minimal Mistakes"
 title_separator          : "-"
+subtitle                 : "Development Test Site"
 name                     : "Your Name"
 description              : "Minimal Mistakes theme test."
 url                      : # the base hostname & protocol for your site e.g. "https://mmistakes.github.io"