diff --git a/backend/src/Squidex.Infrastructure/Json/Objects/JsonValue.cs b/backend/src/Squidex.Infrastructure/Json/Objects/JsonValue.cs
index dd9d6de8e..147fbbe6e 100644
--- a/backend/src/Squidex.Infrastructure/Json/Objects/JsonValue.cs
+++ b/backend/src/Squidex.Infrastructure/Json/Objects/JsonValue.cs
@@ -70,28 +70,28 @@ namespace Squidex.Infrastructure.Json.Objects
 
             switch (value)
             {
-                case string s:
-                    return Create(s);
-                case bool b:
-                    return Create(b);
-                case float f:
-                    return Create(f);
-                case double d:
-                    return Create(d);
-                case int i:
-                    return Create(i);
-                case long l:
-                    return Create(l);
-                case Guid g:
-                    return Create(g);
-                case DomainId i:
-                    return Create(i);
-                case Instant i:
-                    return Create(i);
-                case object[] array:
-                    return Array(array);
-                case IReadOnlyDictionary<string, object?> obj:
-                    return Object(obj);
+                case string typed:
+                    return Create(typed);
+                case bool typed:
+                    return Create(typed);
+                case float typed:
+                    return Create(typed);
+                case double typed:
+                    return Create(typed);
+                case int typed:
+                    return Create(typed);
+                case long typed:
+                    return Create(typed);
+                case Guid typed:
+                    return Create(typed);
+                case DomainId typed:
+                    return Create(typed);
+                case Instant typed:
+                    return Create(typed);
+                case object[] typed:
+                    return Array(typed);
+                case IReadOnlyDictionary<string, object?> typed:
+                    return Object(typed);
             }
 
             throw new ArgumentException("Invalid json type", nameof(value));
diff --git a/backend/src/Squidex.Infrastructure/Queries/ClrValue.cs b/backend/src/Squidex.Infrastructure/Queries/ClrValue.cs
index 0993a4faf..9faedab4c 100644
--- a/backend/src/Squidex.Infrastructure/Queries/ClrValue.cs
+++ b/backend/src/Squidex.Infrastructure/Queries/ClrValue.cs
@@ -64,6 +64,11 @@ namespace Squidex.Infrastructure.Queries
             return value != null ? new ClrValue(value, ClrValueType.String, false) : Null;
         }
 
+        public static implicit operator ClrValue(List<FilterSphere> value)
+        {
+            return value != null ? new ClrValue(value, ClrValueType.Sphere, true) : Null;
+        }
+
         public static implicit operator ClrValue(List<Instant> value)
         {
             return value != null ? new ClrValue(value, ClrValueType.Instant, true) : Null;
@@ -109,6 +114,45 @@ namespace Squidex.Infrastructure.Queries
             return value != null ? new ClrValue(value, ClrValueType.Dynamic, true) : Null;
         }
 
+        public ClrValue ToList()
+        {
+            var value = Value;
+
+            if (IsList || ValueType == ClrValueType.Null || value == null)
+            {
+                return this;
+            }
+
+            ClrValue BuildList<T>(T value)
+            {
+                return new ClrValue(new List<T> { value }, ValueType, true);
+            }
+
+            switch (value)
+            {
+                case FilterSphere typed:
+                    return BuildList(typed);
+                case Instant typed:
+                    return BuildList(typed);
+                case Guid typed:
+                    return BuildList(typed);
+                case bool typed:
+                    return BuildList(typed);
+                case float typed:
+                    return BuildList(typed);
+                case double typed:
+                    return BuildList(typed);
+                case int typed:
+                    return BuildList(typed);
+                case long typed:
+                    return BuildList(typed);
+                case string typed:
+                    return BuildList(typed);
+            }
+
+            return this;
+        }
+
         public override string ToString()
         {
             if (Value is IList list)
diff --git a/backend/src/Squidex.Infrastructure/Queries/Json/JsonFilterVisitor.cs b/backend/src/Squidex.Infrastructure/Queries/Json/JsonFilterVisitor.cs
index 8fa15407b..8177f85aa 100644
--- a/backend/src/Squidex.Infrastructure/Queries/Json/JsonFilterVisitor.cs
+++ b/backend/src/Squidex.Infrastructure/Queries/Json/JsonFilterVisitor.cs
@@ -73,9 +73,19 @@ namespace Squidex.Infrastructure.Queries.Json
 
                 if (value != null && isValidOperator)
                 {
-                    if (value.IsList && nodeIn.Operator != CompareOperator.In)
+                    if (nodeIn.Operator == CompareOperator.In)
                     {
-                        args.Errors.Add($"Array value is not allowed for '{nodeIn.Operator}' operator and path '{nodeIn.Path}'.");
+                        if (!value.IsList)
+                        {
+                            value = value.ToList();
+                        }
+                    }
+                    else
+                    {
+                        if (value.IsList)
+                        {
+                            args.Errors.Add($"Array value is not allowed for '{nodeIn.Operator}' operator and path '{nodeIn.Path}'.");
+                        }
                     }
 
                     if (nodeIn.Operator == CompareOperator.Matchs && value.Value?.ToString()?.IsValidRegex() != true)
diff --git a/backend/tests/Squidex.Infrastructure.Tests/Queries/QueryFromJsonTests.cs b/backend/tests/Squidex.Infrastructure.Tests/Queries/QueryFromJsonTests.cs
index bd5f791de..2dfbdacf8 100644
--- a/backend/tests/Squidex.Infrastructure.Tests/Queries/QueryFromJsonTests.cs
+++ b/backend/tests/Squidex.Infrastructure.Tests/Queries/QueryFromJsonTests.cs
@@ -491,6 +491,14 @@ namespace Squidex.Infrastructure.Queries
 
                 AssertErrors(json, "Array value is not allowed for 'Equals' operator and path 'string'.");
             }
+
+            [Fact]
+            public void Should_convert_single_value_to_list_for_in_operator()
+            {
+                var json = new { path = "string", op = "in", value = "Hello" };
+
+                AssertFilter(json, "string in ['Hello']");
+            }
         }
 
         [Fact]