diff --git a/util/plugins/eu.esdihumboldt.util.groovy.sandbox/src/eu/esdihumboldt/util/groovy/sandbox/internal/RestrictiveGroovyInterceptor.java b/util/plugins/eu.esdihumboldt.util.groovy.sandbox/src/eu/esdihumboldt/util/groovy/sandbox/internal/RestrictiveGroovyInterceptor.java
index dc00b90b54..f8a2ff3860 100644
--- a/util/plugins/eu.esdihumboldt.util.groovy.sandbox/src/eu/esdihumboldt/util/groovy/sandbox/internal/RestrictiveGroovyInterceptor.java
+++ b/util/plugins/eu.esdihumboldt.util.groovy.sandbox/src/eu/esdihumboldt/util/groovy/sandbox/internal/RestrictiveGroovyInterceptor.java
@@ -55,6 +55,7 @@
 import eu.esdihumboldt.util.groovy.sandbox.GroovyRestrictionException;
 import groovy.lang.Closure;
 import groovy.lang.GString;
+import groovy.lang.IntRange;
 import groovy.lang.MissingPropertyException;
 import groovy.lang.Range;
 import groovy.lang.Script;
@@ -156,6 +157,7 @@ public class RestrictiveGroovyInterceptor extends GroovyInterceptor {
 		allowedClasses.add(LinkedHashSet.class);
 		allowedClasses.add(ArrayList.class);
 		allowedClasses.add(Range.class);
+		allowedClasses.add(IntRange.class);
 		allowedClasses.add(GStringImpl.class);
 
 		// Some more collections