diff --git a/jenkins/client/approved_scripts.yml b/jenkins/client/approved_scripts.yml
index d7a21be..eb6a5b8 100644
--- a/jenkins/client/approved_scripts.yml
+++ b/jenkins/client/approved_scripts.yml
@@ -165,3 +165,4 @@
         - staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods toSorted java.lang.Iterable
         - staticMethod org.codehaus.groovy.runtime.EncodingGroovyMethods encodeBase64 byte[]
         - staticMethod org.codehaus.groovy.runtime.ScriptBytecodeAdapter bitwiseNegate java.lang.Object
+        - staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods max java.util.Collection