diff --git a/src/modules/Elsa.Workflows.Core/Serialization/Converters/TypeJsonConverter.cs b/src/modules/Elsa.Workflows.Core/Serialization/Converters/TypeJsonConverter.cs
index c8a4e9a3d..24ff2dfcf 100644
--- a/src/modules/Elsa.Workflows.Core/Serialization/Converters/TypeJsonConverter.cs
+++ b/src/modules/Elsa.Workflows.Core/Serialization/Converters/TypeJsonConverter.cs
@@ -36,7 +36,7 @@ public class TypeJsonConverter : JsonConverter<Type>
         {
             var elementTypeAlias = typeAlias[..^"[]".Length];
             var elementType = _wellKnownTypeRegistry.TryGetType(elementTypeAlias, out var t) ? t : Type.GetType(elementTypeAlias)!;
-            return typeof(List<>).MakeGenericType(elementType);
+            return elementType.MakeArrayType();
         }
 
         return _wellKnownTypeRegistry.TryGetType(typeAlias, out var type) ? type : Type.GetType(typeAlias);
diff --git a/src/modules/Elsa.Workflows.Management/Mappers/VariableDefinitionMapper.cs b/src/modules/Elsa.Workflows.Management/Mappers/VariableDefinitionMapper.cs
index 787c5d341..2d741dbc6 100644
--- a/src/modules/Elsa.Workflows.Management/Mappers/VariableDefinitionMapper.cs
+++ b/src/modules/Elsa.Workflows.Management/Mappers/VariableDefinitionMapper.cs
@@ -30,7 +30,7 @@ public class VariableDefinitionMapper
         if (!_wellKnownTypeRegistry.TryGetTypeOrDefault(source.TypeName, out var type))
             return null;
 
-        var valueType = source.IsArray ? typeof(ICollection<>).MakeGenericType(type) : type;
+        var valueType = source.IsArray ? type.MakeArrayType() : type;
         var variableGenericType = typeof(Variable<>).MakeGenericType(valueType);
         var variable = (Variable)Activator.CreateInstance(variableGenericType)!;