diff --git a/dockerfiles/tasks/Jenkinsfile b/dockerfiles/tasks/Jenkinsfile
index 26c48a8..8124e6a 100644
--- a/dockerfiles/tasks/Jenkinsfile
+++ b/dockerfiles/tasks/Jenkinsfile
@@ -3,7 +3,7 @@ pipeline {
     parameters {
         choice(
             name: 'IMAGE',
-            choices: ['ansible', 'apidocjs', 'composer', 'mondrian', 'php', 'robo'],
+            choices: ['acme-nginx', 'ansible', 'apidocjs', 'composer', 'mondrian', 'php', 'robo'],
             description: 'What image would you like to build?'
         )
     }
diff --git a/dockerfiles/tasks/acme-nginx/build.Jenkinsfile b/dockerfiles/tasks/acme-nginx/build.Jenkinsfile
index 36e44c1..fa183c8 100644
--- a/dockerfiles/tasks/acme-nginx/build.Jenkinsfile
+++ b/dockerfiles/tasks/acme-nginx/build.Jenkinsfile
@@ -1,7 +1,7 @@
 pipeline {
     agent { label 'docker' }
     triggers {
-        cron('@daily')
+        cron('@monthly')
     }
     options {
         disableConcurrentBuilds()