diff --git a/build.gradle b/build.gradle
index c86569e..c707b71 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ plugins {
 }
 
 group 'no.datek'
-version '0.18.0'
+version '0.18.1'
 final String JRUBY_VERSION = '9.4.5.0';
 
 repositories {
diff --git a/src/main/resources/ruby/load_slim.rb b/src/main/resources/ruby/load_slim.rb
index 0d26da4..da72e8c 100644
--- a/src/main/resources/ruby/load_slim.rb
+++ b/src/main/resources/ruby/load_slim.rb
@@ -7,8 +7,10 @@
 rescue Exception => e
   Java::OrgApacheCommonsLogging::LogFactory.getLog('no.datek.slim').error(e.to_s)
 
-  def render_slim(template, model_map, rendering_context)
-    "<h1>Whoops!</h1><p>Failed to load SLIM template framework.</p>"
+  module SlimRenderer
+    def self.render(template, model_map, rendering_context)
+      "<h1>Whoops!</h1><p>Failed to load SLIM template framework.</p>"
+    end
   end
 end
 
diff --git a/src/main/resources/ruby/slim_helper.rb b/src/main/resources/ruby/slim_helper.rb
index 7290885..4f93962 100644
--- a/src/main/resources/ruby/slim_helper.rb
+++ b/src/main/resources/ruby/slim_helper.rb
@@ -107,7 +107,7 @@ def formatDateTime(date_time, format = 'yyyy-MM-dd HH:mm:ss', timeZoneId: TimeZo
     DateUtils.formatLocalDateTime(local_date_time, format, timeZoneId)
   end
 
-  def formatDate(date, format = '%d.%m.%Y')
+  def formatDate(date, format = '%Y-%m-%d')
     if date.nil?
       return ''
     end
diff --git a/src/main/resources/ruby/slim_renderer.rb b/src/main/resources/ruby/slim_renderer.rb
index 933be84..135a82d 100644
--- a/src/main/resources/ruby/slim_renderer.rb
+++ b/src/main/resources/ruby/slim_renderer.rb
@@ -21,7 +21,7 @@
 require_relative 'request_context'
 require 'application_setup'
 
-class SlimRenderer
+module SlimRenderer
   extend LocaleHelper
   extend ClassPatcher
   include Log