Rakefile in zeebe-client-0.7.0 vs Rakefile in zeebe-client-0.8.0

@@ -11,10 +11,10 @@
 
 task travis: ['zeebe:start', :default, 'zeebe:stop']
 
 desc 'Starts Zeebe Docker container'
 task 'zeebe:start' do
-  sh 'docker run -d --name zeebe --rm -p 26500:26500 camunda/zeebe:0.20.0'
+  sh 'docker run -d --name zeebe --rm -p 26500:26500 camunda/zeebe:0.21.1'
   sleep(5)
 end
 
 desc 'Stops Zeebe Docker container'
 task 'zeebe:stop' do