diff --git a/changelogs/unreleased/revert-appearances-description-html-not-null.yml b/changelogs/unreleased/revert-appearances-description-html-not-null.yml
new file mode 100644
index 0000000000000000000000000000000000000000..4e3c39cb5fd9b967bb7d8dd9498431d3d78aeffb
--- /dev/null
+++ b/changelogs/unreleased/revert-appearances-description-html-not-null.yml
@@ -0,0 +1,5 @@
+---
+title: Re-allow appearances.description_html to be NULL
+merge_request:
+author:
+type: fixed
diff --git a/db/migrate/20170809142252_cleanup_appearances_schema.rb b/db/migrate/20170809142252_cleanup_appearances_schema.rb
index 90d12925ba29996c715c0d2927748788492a82a9..acf45060114740bf7c496ffa54c474511b1b233c 100644
--- a/db/migrate/20170809142252_cleanup_appearances_schema.rb
+++ b/db/migrate/20170809142252_cleanup_appearances_schema.rb
@@ -7,7 +7,7 @@ class CleanupAppearancesSchema < ActiveRecord::Migration
   # Set this constant to true if this migration requires downtime.
   DOWNTIME = false
 
-  NOT_NULL_COLUMNS = %i[title description description_html created_at updated_at]
+  NOT_NULL_COLUMNS = %i[title description created_at updated_at]
 
   TIME_COLUMNS = %i[created_at updated_at]
 
diff --git a/db/migrate/20170824162758_allow_appearances_description_html_null.rb b/db/migrate/20170824162758_allow_appearances_description_html_null.rb
new file mode 100644
index 0000000000000000000000000000000000000000..d7f481ee8942632741eb524ac9d1096c4ab92a4b
--- /dev/null
+++ b/db/migrate/20170824162758_allow_appearances_description_html_null.rb
@@ -0,0 +1,18 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AllowAppearancesDescriptionHtmlNull < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def up
+    change_column_null :appearances, :description_html, true
+  end
+
+  def down
+    # This column should not have a `NOT NULL` class, so we don't want to revert
+    # back to re-adding it.
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index cd488630237be762b32af14cee59afd92d86d643..0f4b0c0c3b3a90b6d716206d4224fa550db68ac1 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170820100558) do
+ActiveRecord::Schema.define(version: 20170824162758) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -34,7 +34,7 @@ ActiveRecord::Schema.define(version: 20170820100558) do
     t.string "logo"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.text "description_html", null: false
+    t.text "description_html"
     t.integer "cached_markdown_version"
   end