diff --git a/lib/mastodon/cli/domains.rb b/lib/mastodon/cli/domains.rb
index c247463af5..cbd3465e04 100644
--- a/lib/mastodon/cli/domains.rb
+++ b/lib/mastodon/cli/domains.rb
@@ -214,7 +214,7 @@ module Mastodon::CLI
 
     def stats_to_json(stats)
       stats.compact!
-      say(Oj.dump(stats))
+      say(stats.to_json)
     end
   end
 end
diff --git a/spec/lib/mastodon/cli/domains_spec.rb b/spec/lib/mastodon/cli/domains_spec.rb
index d1c26546f0..0d2c7f70a8 100644
--- a/spec/lib/mastodon/cli/domains_spec.rb
+++ b/spec/lib/mastodon/cli/domains_spec.rb
@@ -87,7 +87,7 @@ RSpec.describe Mastodon::CLI::Domains do
         end
 
         def json_summary
-          Oj.dump('host.example': { activity: {} })
+          JSON.generate('host.example': { activity: {} })
         end
       end
     end