MAGETWO-53010: [Email Logo] Saving a custom transactional email logo, failed.

Author: Oleksandr Karpenko

app/code/Magento/Email/composer.json

@@ -3,6 +3,7 @@
     "description": "N/A",
     "require": {
         "php": "~5.6.0|7.0.2|~7.0.6",
+        "magento/module-theme": "100.1.*",
         "magento/module-config": "100.1.*",
         "magento/module-store": "100.1.*",
         "magento/module-cms": "101.0.*",