diff --git a/server/config/deploy/production.rb b/server/config/deploy/production.rb
index cc7e70051..2635b0050 100644
--- a/server/config/deploy/production.rb
+++ b/server/config/deploy/production.rb
@@ -1,7 +1,7 @@
 server "44.231.73.12", user: 'ubuntu', roles: %w{web db app}
 
 set :branch, 'release'
-set :rbenv_ruby, '3.3.0'
+set :rbenv_ruby, '3.3.5'
 
 set :rails_env, 'production'
 
@@ -14,3 +14,16 @@
     auth_methods: %w(publickey)
   }
 end
+
+# from https://github.com/capistrano/rails?tab=readme-ov-file#uploading-your-masterkey
+namespace :deploy do
+  namespace :check do
+    before :linked_files, :set_master_key do
+      on roles(:app) do
+        unless test("[ -f #{shared_path}/config/credentials/production.key ]")
+          upload! 'config/credentials/production.key', "#{shared_path}/config/credentials/production.key"
+        end
+      end
+    end
+  end
+end