diff --git a/src/AutoFilterer/Abstractions/IOrderable.cs b/src/AutoFilterer/Abstractions/IOrderable.cs
index 230c9e3..45e01a5 100644
--- a/src/AutoFilterer/Abstractions/IOrderable.cs
+++ b/src/AutoFilterer/Abstractions/IOrderable.cs
@@ -10,7 +10,7 @@ public interface IOrderable
 {
     [IgnoreFilter] Sorting SortBy { get; set; }
 
-    [IgnoreFilter] string Sort { get; }
+    [IgnoreFilter] string? Sort { get; }
 
     IOrderedQueryable<TSource> ApplyOrder<TSource>(IQueryable<TSource> source);
 }
diff --git a/src/AutoFilterer/Abstractions/IPaginationFilter.cs b/src/AutoFilterer/Abstractions/IPaginationFilter.cs
index 2ddb7f7..94bde32 100644
--- a/src/AutoFilterer/Abstractions/IPaginationFilter.cs
+++ b/src/AutoFilterer/Abstractions/IPaginationFilter.cs
@@ -5,8 +5,8 @@ namespace AutoFilterer.Abstractions;
 
 public interface IPaginationFilter : IFilter
 {
-    [IgnoreFilter] int Page { get; set; }
-    [IgnoreFilter] int PerPage { get; set; }
+    [IgnoreFilter] int? Page { get; set; }
+    [IgnoreFilter] int? PerPage { get; set; }
 
     IQueryable<T> ApplyFilterWithoutPagination<T>(IQueryable<T> query);
 }
diff --git a/src/AutoFilterer/Types/OrderableBase.cs b/src/AutoFilterer/Types/OrderableBase.cs
index ed54315..1491728 100644
--- a/src/AutoFilterer/Types/OrderableBase.cs
+++ b/src/AutoFilterer/Types/OrderableBase.cs
@@ -16,7 +16,7 @@ public class OrderableBase : IOrderable
     private static readonly MethodInfo orderByDescending = typeof(Queryable).GetMethods().First(x => x.Name == nameof(Queryable.OrderByDescending));
 
     [IgnoreFilter] public virtual Sorting SortBy { get; set; }
-    [IgnoreFilter] public virtual string Sort { get; }
+    [IgnoreFilter] public virtual string? Sort { get; }
 
     public virtual IOrderedQueryable<TSource> ApplyOrder<TSource>(IQueryable<TSource> queryable)
     {
diff --git a/src/AutoFilterer/Types/PaginationFilterBase.cs b/src/AutoFilterer/Types/PaginationFilterBase.cs
index f6612a0..2ec2ac7 100644
--- a/src/AutoFilterer/Types/PaginationFilterBase.cs
+++ b/src/AutoFilterer/Types/PaginationFilterBase.cs
@@ -9,21 +9,21 @@ namespace AutoFilterer.Types;
 public class PaginationFilterBase : OrderableFilterBase, IOrderablePaginationFilter
 {
     [IgnoreFilter]
-    public virtual int Page { get; set; } = 1;
+    public virtual int? Page { get; set; } = 1;
 
     [IgnoreFilter]
-    public virtual int PerPage { get; set; } = 10;
+    public virtual int? PerPage { get; set; } = 10;
 
     public override IQueryable<TEntity> ApplyFilterTo<TEntity>(IQueryable<TEntity> query)
     {
         if (query is IOrderedQueryable<TEntity> ordered)
             return this.ApplyFilterTo(ordered);
 
-        return base.ApplyFilterTo(query).ToPaged(Page, PerPage);
+        return base.ApplyFilterTo(query).ToPaged(Page ?? 1, PerPage ?? 10);
     }
 
     public virtual IQueryable<TEntity> ApplyFilterTo<TEntity>(IOrderedQueryable<TEntity> query)
-        => base.ApplyFilterTo(query).ToPaged(Page, PerPage);
+        => base.ApplyFilterTo(query).ToPaged(Page ?? 1, PerPage ?? 10);
 
     public virtual IQueryable<T> ApplyFilterWithoutPagination<T>(IQueryable<T> query)
         => base.ApplyFilterTo(query);
diff --git a/src/AutoFilterer/Types/StringFilter.cs b/src/AutoFilterer/Types/StringFilter.cs
index df058b8..b5e08af 100644
--- a/src/AutoFilterer/Types/StringFilter.cs
+++ b/src/AutoFilterer/Types/StringFilter.cs
@@ -15,47 +15,47 @@ public class StringFilter : IFilterableType
     /// <summary>
     /// Provides parameter for equal operator '==' in query.
     /// </summary>
-    public virtual string Eq { get; set; }
+    public virtual string? Eq { get; set; }
 
     /// <summary>
     /// Provides parameter to not equal operator '!=' in query.
     /// </summary>
-    public virtual string Not { get; set; }
+    public virtual string? Not { get; set; }
 
     /// <summary>
     /// Provides parameter to String.Equals method query.
     /// </summary>
-    public virtual new string Equals { get; set; }
+    public virtual new string? Equals { get; set; }
 
     /// <summary>
     /// Provides parameter to String.Contains method query.
     /// </summary>
-    public virtual string Contains { get; set; }
+    public virtual string? Contains { get; set; }
     
     /// <summary>
     /// Provides parameter to !String.Contains method query.
     /// </summary>
-    public virtual string NotContains { get; set; }
+    public virtual string? NotContains { get; set; }
 
     /// <summary>
     /// Provides parameter to String.StartsWith method query.
     /// </summary>
-    public virtual string StartsWith { get; set; }
+    public virtual string? StartsWith { get; set; }
     
     /// <summary>
     /// Provides parameter to !String.StartsWith method query.
     /// </summary>
-    public virtual string NotStartsWith { get; set; }
+    public virtual string? NotStartsWith { get; set; }
 
     /// <summary>
     /// Provides parameter to String.EndsWith method query.
     /// </summary>
-    public virtual string EndsWith { get; set; }
+    public virtual string? EndsWith { get; set; }
     
     /// <summary>
     /// Provides parameter to !String.EndsWith method query.
     /// </summary>
-    public virtual string NotEndsWith { get; set; }
+    public virtual string? NotEndsWith { get; set; }
     
     /// <summary>
     /// Provides parameter to check is null.