diff --git a/azuracast.dev.env b/azuracast.dev.env
index 7a1cb5df0..45b8536ed 100644
--- a/azuracast.dev.env
+++ b/azuracast.dev.env
@@ -2,9 +2,9 @@
 # AzuraCast Customization
 #
 
-# The application environment.
-# Valid options: production or development
 APPLICATION_ENV=development
+PREFER_RELEASE_BUILDS=false
+COMPOSER_PLUGIN_MODE=false
 
 # Developer options.
 # Populate these!
diff --git a/azuracast.sample.env b/azuracast.sample.env
index 73267d959..4872f9b97 100644
--- a/azuracast.sample.env
+++ b/azuracast.sample.env
@@ -3,9 +3,20 @@
 #
 
 # The application environment.
-# Valid options: production or development
+# Valid options: production, development, testing
 APPLICATION_ENV=production
 
+# Prefer release versions over always-updating "rolling" releases.
+# Valid options: true, false
+PREFER_RELEASE_BUILDS=false
+
+# Enable the composer "merge" functionality to combine the main application's
+# composer.json file with any plugins' composer files.
+# This can have performance implications, so you should only use it if
+# you use one or more plugins with their own Composer dependencies.
+# Valid options: true, false
+COMPOSER_PLUGIN_MODE=false
+
 #
 # Database Configuration
 # --