diff --git a/config/danbooru_default_config.rb b/config/danbooru_default_config.rb
index fd0900de6..5ade06b0c 100644
--- a/config/danbooru_default_config.rb
+++ b/config/danbooru_default_config.rb
@@ -4,7 +4,7 @@ module Danbooru
   class Configuration
     # The version of this Danbooru.
     def version
-      "2.90.0"
+      "2.91.0"
     end
 
     # The name of this Danbooru.