diff --git a/SpotifyAPI.Web.Examples/Example.ASPBlazor/Pages/Index.razor b/SpotifyAPI.Web.Examples/Example.ASPBlazor/Pages/Index.razor
index abf6f3a0..d669463b 100644
--- a/SpotifyAPI.Web.Examples/Example.ASPBlazor/Pages/Index.razor
+++ b/SpotifyAPI.Web.Examples/Example.ASPBlazor/Pages/Index.razor
@@ -26,7 +26,7 @@ else
 
   private PrivateUser _me;
 
-  private int _totalPlaylistCount;
+  private int? _totalPlaylistCount;
 
   protected override void OnInitialized()
   {
diff --git a/SpotifyAPI.Web.Examples/Example.BlazorWASM/Pages/Index.razor b/SpotifyAPI.Web.Examples/Example.BlazorWASM/Pages/Index.razor
index 7e277b1c..a222de81 100644
--- a/SpotifyAPI.Web.Examples/Example.BlazorWASM/Pages/Index.razor
+++ b/SpotifyAPI.Web.Examples/Example.BlazorWASM/Pages/Index.razor
@@ -33,7 +33,7 @@ else
 
   private PrivateUser _me;
 
-  private int _totalPlaylistCount;
+  private int? _totalPlaylistCount;
 
   private Uri _authUri;
 
diff --git a/SpotifyAPI.Web/Clients/SimplePaginator.cs b/SpotifyAPI.Web/Clients/SimplePaginator.cs
index b15c0958..92f35dac 100644
--- a/SpotifyAPI.Web/Clients/SimplePaginator.cs
+++ b/SpotifyAPI.Web/Clients/SimplePaginator.cs
@@ -64,6 +64,10 @@ namespace SpotifyAPI.Web
     {
       Ensure.ArgumentNotNull(firstPage, nameof(firstPage));
       Ensure.ArgumentNotNull(connector, nameof(connector));
+      if (firstPage.Items == null)
+      {
+        throw new ArgumentException("The first page has to contain an Items list!", nameof(firstPage));
+      }
 
       var page = firstPage;
       foreach (var item in page.Items)
@@ -73,7 +77,7 @@ namespace SpotifyAPI.Web
       while (page.Next != null)
       {
         page = await connector.Get<Paging<T>>(new Uri(page.Next, UriKind.Absolute)).ConfigureAwait(false);
-        foreach (var item in page.Items)
+        foreach (var item in page.Items!)
         {
           yield return item;
         }
@@ -89,6 +93,10 @@ namespace SpotifyAPI.Web
       Ensure.ArgumentNotNull(firstPage, nameof(firstPage));
       Ensure.ArgumentNotNull(mapper, nameof(mapper));
       Ensure.ArgumentNotNull(connector, nameof(connector));
+      if (firstPage.Items == null)
+      {
+        throw new ArgumentException("The first page has to contain an Items list!", nameof(firstPage));
+      }
 
       var page = firstPage;
       foreach (var item in page.Items)
@@ -99,7 +107,7 @@ namespace SpotifyAPI.Web
       {
         var next = await connector.Get<TNext>(new Uri(page.Next, UriKind.Absolute)).ConfigureAwait(false);
         page = mapper(next);
-        foreach (var item in page.Items)
+        foreach (var item in page.Items!)
         {
           yield return item;
         }
diff --git a/SpotifyAPI.Web/Models/IPaginatable.cs b/SpotifyAPI.Web/Models/IPaginatable.cs
index e5752bc8..682c5ac1 100644
--- a/SpotifyAPI.Web/Models/IPaginatable.cs
+++ b/SpotifyAPI.Web/Models/IPaginatable.cs
@@ -5,17 +5,17 @@ namespace SpotifyAPI.Web
   public interface IPaginatable<T>
   {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1716")]
-    string Next { get; set; }
+    string? Next { get; set; }
 
-    List<T> Items { get; set; }
+    List<T>? Items { get; set; }
   }
 
   public interface IPaginatable<T, TNext>
   {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1716")]
-    string Next { get; set; }
+    string? Next { get; set; }
 
-    List<T> Items { get; set; }
+    List<T>? Items { get; set; }
   }
 }
 
diff --git a/SpotifyAPI.Web/Models/Request/RequestParams.cs b/SpotifyAPI.Web/Models/Request/RequestParams.cs
index bb7589ed..d5cc3319 100644
--- a/SpotifyAPI.Web/Models/Request/RequestParams.cs
+++ b/SpotifyAPI.Web/Models/Request/RequestParams.cs
@@ -122,7 +122,8 @@ namespace SpotifyAPI.Web
               {
                 if (StringAttribute.GetValue(enumType, enumVal, out var stringVal))
                 {
-                  valueList.Add(stringVal);
+                  // .netstandard2.0 requires !
+                  valueList.Add(stringVal!);
                 }
               }
             }
@@ -131,7 +132,8 @@ namespace SpotifyAPI.Web
           {
             if (StringAttribute.GetValue(enumType, valueAsEnum, out var stringVal))
             {
-              valueList.Add(stringVal);
+              // .netstandard2.0 requires !
+              valueList.Add(stringVal!);
             }
           }
           queryParams.Add(attribute.Key ?? prop.Name, string.Join(",", valueList));
diff --git a/SpotifyAPI.Web/Models/Response/CursorPaging.cs b/SpotifyAPI.Web/Models/Response/CursorPaging.cs
index f56ef97f..262c1fbe 100644
--- a/SpotifyAPI.Web/Models/Response/CursorPaging.cs
+++ b/SpotifyAPI.Web/Models/Response/CursorPaging.cs
@@ -5,9 +5,9 @@ namespace SpotifyAPI.Web
   public class CursorPaging<T> : IPaginatable<T>
   {
     public string Href { get; set; } = default!;
-    public List<T> Items { get; set; } = default!;
+    public List<T>? Items { get; set; } = default!;
     public int Limit { get; set; }
-    public string Next { get; set; } = default!;
+    public string? Next { get; set; } = default!;
     public Cursor Cursors { get; set; } = default!;
     public int Total { get; set; }
   }
@@ -15,9 +15,9 @@ namespace SpotifyAPI.Web
   public class CursorPaging<T, TNext> : IPaginatable<T, TNext>
   {
     public string Href { get; set; } = default!;
-    public List<T> Items { get; set; } = default!;
+    public List<T>? Items { get; set; } = default!;
     public int Limit { get; set; }
-    public string Next { get; set; } = default!;
+    public string? Next { get; set; } = default!;
     public Cursor Cursors { get; set; } = default!;
     public int Total { get; set; }
   }
diff --git a/SpotifyAPI.Web/Models/Response/FullPlaylist.cs b/SpotifyAPI.Web/Models/Response/FullPlaylist.cs
index fa6945b8..01e02b7d 100644
--- a/SpotifyAPI.Web/Models/Response/FullPlaylist.cs
+++ b/SpotifyAPI.Web/Models/Response/FullPlaylist.cs
@@ -3,23 +3,23 @@ namespace SpotifyAPI.Web
 {
   public class FullPlaylist
   {
-    public bool Collaborative { get; set; }
-    public Dictionary<string, string> ExternalUrls { get; set; } = default!;
-    public string Href { get; set; } = default!;
-    public string Id { get; set; } = default!;
-    public List<Image> Images { get; set; } = default!;
-    public string Name { get; set; } = default!;
-    public PublicUser Owner { get; set; } = default!;
-    public bool Public { get; set; }
-    public string SnapshotId { get; set; } = default!;
+    public bool? Collaborative { get; set; }
+    public Dictionary<string, string>? ExternalUrls { get; set; } = default!;
+    public string? Href { get; set; } = default!;
+    public string? Id { get; set; } = default!;
+    public List<Image>? Images { get; set; } = default!;
+    public string? Name { get; set; } = default!;
+    public PublicUser? Owner { get; set; } = default!;
+    public bool? Public { get; set; }
+    public string? SnapshotId { get; set; } = default!;
 
     /// <summary>
     /// A list of PlaylistTracks, which items can be a FullTrack or FullEpisode
     /// </summary>
     /// <value></value>
-    public Paging<PlaylistTrack<IPlayableItem>> Tracks { get; set; } = default!;
-    public string Type { get; set; } = default!;
-    public string Uri { get; set; } = default!;
+    public Paging<PlaylistTrack<IPlayableItem>>? Tracks { get; set; } = default!;
+    public string? Type { get; set; } = default!;
+    public string? Uri { get; set; } = default!;
   }
 }
 
diff --git a/SpotifyAPI.Web/Models/Response/Paging.cs b/SpotifyAPI.Web/Models/Response/Paging.cs
index 296a82ac..a03756c4 100644
--- a/SpotifyAPI.Web/Models/Response/Paging.cs
+++ b/SpotifyAPI.Web/Models/Response/Paging.cs
@@ -4,24 +4,24 @@ namespace SpotifyAPI.Web
 {
   public class Paging<T> : IPaginatable<T>
   {
-    public string Href { get; set; } = default!;
-    public List<T> Items { get; set; } = default!;
-    public int Limit { get; set; }
-    public string Next { get; set; } = default!;
-    public int Offset { get; set; }
-    public string Previous { get; set; } = default!;
-    public int Total { get; set; }
+    public string? Href { get; set; } = default!;
+    public List<T>? Items { get; set; } = default!;
+    public int? Limit { get; set; } = default!;
+    public string? Next { get; set; } = default!;
+    public int? Offset { get; set; } = default!;
+    public string? Previous { get; set; } = default!;
+    public int? Total { get; set; } = default!;
   }
 
   public class Paging<T, TNext> : IPaginatable<T, TNext>
   {
-    public string Href { get; set; } = default!;
-    public List<T> Items { get; set; } = default!;
-    public int Limit { get; set; }
-    public string Next { get; set; } = default!;
-    public int Offset { get; set; }
-    public string Previous { get; set; } = default!;
-    public int Total { get; set; }
+    public string? Href { get; set; } = default!;
+    public List<T>? Items { get; set; } = default!;
+    public int? Limit { get; set; } = default!;
+    public string? Next { get; set; } = default!;
+    public int? Offset { get; set; } = default!;
+    public string? Previous { get; set; } = default!;
+    public int? Total { get; set; } = default!;
   }
 }