diff --git a/config/locales/de.yaml b/config/locales/de.yml
similarity index 100%
rename from config/locales/de.yaml
rename to config/locales/de.yml
diff --git a/config/locales/en.yaml b/config/locales/en.yml
similarity index 100%
rename from config/locales/en.yaml
rename to config/locales/en.yml
diff --git a/config/locales/es.yaml b/config/locales/es.yml
similarity index 100%
rename from config/locales/es.yaml
rename to config/locales/es.yml
diff --git a/config/locales/fr.yaml b/config/locales/fr.yml
similarity index 100%
rename from config/locales/fr.yaml
rename to config/locales/fr.yml
diff --git a/config/locales/zh.yaml b/config/locales/zh.yml
similarity index 100%
rename from config/locales/zh.yaml
rename to config/locales/zh.yml
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 912d669..53f2827 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -9,7 +9,7 @@
 require 'rspec/collection_matchers'
 require 'validates_hostname'
 
-I18n.load_path += Dir[File.expand_path('../config/locales/*.yaml', __dir__)]
+I18n.load_path += Dir[File.expand_path('../config/locales/*.yml', __dir__)]
 
 RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure