diff --git a/designer/server/src/main/scala/pl/touk/nussknacker/ui/definition/DefinitionsService.scala b/designer/server/src/main/scala/pl/touk/nussknacker/ui/definition/DefinitionsService.scala
index 92c5d4b8b4b..2f8d59055ab 100644
--- a/designer/server/src/main/scala/pl/touk/nussknacker/ui/definition/DefinitionsService.scala
+++ b/designer/server/src/main/scala/pl/touk/nussknacker/ui/definition/DefinitionsService.scala
@@ -10,7 +10,7 @@ import pl.touk.nussknacker.engine.definition.component.{ComponentStaticDefinitio
 import pl.touk.nussknacker.engine.util.Implicits.RichScalaMap
 import pl.touk.nussknacker.engine.ModelData
 import pl.touk.nussknacker.engine.api.TemplateEvaluationResult
-import pl.touk.nussknacker.engine.api.typed.typing.{Typed, TypingResult}
+import pl.touk.nussknacker.engine.api.typed.typing.{Typed, TypedClass, TypingResult}
 import pl.touk.nussknacker.restmodel.definition._
 import pl.touk.nussknacker.ui.definition.DefinitionsService.{
   ComponentUiConfigMode,
@@ -106,7 +106,13 @@ class DefinitionsService(
     UIDefinitions(
       componentGroups = ComponentGroupsPreparer.prepareComponentGroups(components),
       components = components.map(component => component.component.id -> createUIComponentDefinition(component)).toMap,
-      classes = modelData.modelDefinitionWithClasses.classDefinitions.all.toList.map(_.clazzName),
+      classes = modelData.modelDefinitionWithClasses.classDefinitions.all.toList
+        .map(_.clazzName)
+        .filter {
+          case t: TypedClass if t.klass.isArray => false
+          case _                                => true
+        }
+        .sortBy(_.display.toLowerCase),
       scenarioProperties = {
         if (forFragment) {
           createUIProperties(FragmentPropertiesConfig.properties ++ fragmentPropertiesConfig, fragmentPropertiesDocsUrl)
diff --git a/designer/server/src/test/scala/pl/touk/nussknacker/ui/api/DefinitionResourcesSpec.scala b/designer/server/src/test/scala/pl/touk/nussknacker/ui/api/DefinitionResourcesSpec.scala
index e79e236834e..d62d72a92db 100644
--- a/designer/server/src/test/scala/pl/touk/nussknacker/ui/api/DefinitionResourcesSpec.scala
+++ b/designer/server/src/test/scala/pl/touk/nussknacker/ui/api/DefinitionResourcesSpec.scala
@@ -10,6 +10,7 @@ import org.scalatest.{BeforeAndAfterAll, BeforeAndAfterEach, OptionValues}
 import pl.touk.nussknacker.engine.api.CirceUtil.RichACursor
 import pl.touk.nussknacker.engine.api.definition.FixedExpressionValue
 import pl.touk.nussknacker.engine.api.parameter.{ParameterName, ValueInputWithFixedValuesProvided}
+import pl.touk.nussknacker.engine.api.typed.typing.{Typed, TypingResult, Unknown}
 import pl.touk.nussknacker.engine.api.{FragmentSpecificData, MetaData}
 import pl.touk.nussknacker.engine.canonicalgraph.canonicalnode.FlatNode
 import pl.touk.nussknacker.engine.canonicalgraph.{CanonicalProcess, canonicalnode}
@@ -103,6 +104,20 @@ class DefinitionResourcesSpec
     }
   }
 
+  it("should return definition sorted data for allowed classes - skipping array because list should be uses instead") {
+    getProcessDefinitionData() ~> check {
+      status shouldBe StatusCodes.OK
+
+      val allowedClasses              = responseAs[Json].hcursor.downField("classes").focus.value.asArray.value
+      val allowedClassesRefClazzNames = allowedClasses.flatMap(_.hcursor.downField("refClazzName").focus.value.asString)
+      val allowedClassesDisplay       = allowedClasses.flatMap(_.hcursor.downField("display").focus.value.asString)
+
+      allowedClassesRefClazzNames should contain("java.util.List")
+      allowedClassesRefClazzNames should not contain (Array().getClass.getName)
+      allowedClassesDisplay shouldBe allowedClassesDisplay.sortBy(_.toLowerCase)
+    }
+  }
+
   it("should return info about editor based on fragment parameter definition") {
     val fragmentWithFixedValuesEditor = {
       CanonicalProcess(