diff --git a/vmware-host-pooler-api b/vmware-host-pooler-api
index 97198f7..ad52bc3 100755
--- a/vmware-host-pooler-api
+++ b/vmware-host-pooler-api
@@ -48,7 +48,7 @@ get '/vm/:template' do
   result[params[:template]] = {}
   result[params[:template]]['hosts'] = $redis.smembers('vmware_host_pool__ready__'+params[:template])
 
-  result.to_json
+  JSON.pretty_generate(result)
 end
 
 post '/vm/:template' do
@@ -70,7 +70,7 @@ post '/vm/:template' do
     result[params[:template]]['hostname'] = vm
   end
 
-  result.to_json
+  JSON.pretty_generate(result)
 end
 
 delete '/vm/:hostname' do
@@ -86,6 +86,6 @@ delete '/vm/:hostname' do
   end
 
   result['ok'] = 'true'
-  result.to_json
+  JSON.pretty_generate(result)
 end