diff --git a/.claude/settings.local.json b/.claude/settings.local.json
new file mode 100644
index 0000000..c684b20
--- /dev/null
+++ b/.claude/settings.local.json
@@ -0,0 +1,9 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(dotnet build *)",
+      "Bash(dotnet restore *)",
+      "Bash(dotnet test *)"
+    ]
+  }
+}
diff --git a/src/Geta.Optimizely.Extensions.Web/Geta.Optimizely.Extensions.Web.csproj b/src/Geta.Optimizely.Extensions.Web/Geta.Optimizely.Extensions.Web.csproj
index d97afd3..b6b43b9 100644
--- a/src/Geta.Optimizely.Extensions.Web/Geta.Optimizely.Extensions.Web.csproj
+++ b/src/Geta.Optimizely.Extensions.Web/Geta.Optimizely.Extensions.Web.csproj
@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
       <GenerateRazorSdkCompilation>true</GenerateRazorSdkCompilation>
@@ -13,10 +13,10 @@
       <ProjectReference Include="..\Geta.Optimizely.Extensions\Geta.Optimizely.Extensions.csproj" />
     </ItemGroup>
 
-  <Import Project="..\..\sub\geta-foundation-core\src\Foundation\modules\ModulesInclude.proj"/>
+  <Import Project="..\..\sub\geta-foundation-core\src\Foundation\modules\ModulesInclude.proj" />
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="6.0.36" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="10.0.7" />
   </ItemGroup>
 
 </Project>
diff --git a/src/Geta.Optimizely.Extensions.Web/appsettings.json b/src/Geta.Optimizely.Extensions.Web/appsettings.json
index 98f452c..500a941 100644
--- a/src/Geta.Optimizely.Extensions.Web/appsettings.json
+++ b/src/Geta.Optimizely.Extensions.Web/appsettings.json
@@ -11,13 +11,15 @@
     }
   },
   "AllowedHosts": "*",
-  "EPiServer": {
-    "Find": {
-      "DefaultIndex": "changeme",
-      "ServiceUrl": "http://changeme",
-      "TrackingSanitizerEnabled": true,
-      "TrackingTimeout": 30000
-    },
+  "Optimizely": {
+    "ContentGraph": {
+      "GatewayAddress": "https://cg.optimizely.com",
+      "AppKey": "changeme",
+      "Secret": "changeme",
+      "SingleKey": "changeme"
+    }
+  },
+  "EPiServer": {    
     "OdpVisitorGroupOptions": {
       "OdpCookieName": "vuid",
       "CacheTimeoutSeconds": 1,
diff --git a/src/Geta.Optimizely.Extensions/ContentAreaExtensions.cs b/src/Geta.Optimizely.Extensions/ContentAreaExtensions.cs
index 0fd42d7..819c3be 100644
--- a/src/Geta.Optimizely.Extensions/ContentAreaExtensions.cs
+++ b/src/Geta.Optimizely.Extensions/ContentAreaExtensions.cs
@@ -1,5 +1,8 @@
-using System.Linq;
+using System.Linq;
+using EPiServer;
 using EPiServer.Core;
+using EPiServer.Security;
+using EPiServer.ServiceLocation;
 
 namespace Geta.Optimizely.Extensions
 {
@@ -9,13 +12,43 @@ namespace Geta.Optimizely.Extensions
     public static class ContentAreaExtensions
     {
         /// <summary>
-        /// Checks if content area has content.
+        /// Checks if content area has any content that is visible to the current user
+        /// (published, not expired and not access restricted).
         /// </summary>
         /// <param name="contentArea">The content area.</param>
-        /// <returns>Returns true if content area has content and false when not.</returns>
+        /// <returns>Returns true if the content area has at least one visible item and false when not.</returns>
         public static bool HasContent(this ContentArea contentArea)
         {
-            return contentArea?.FilteredItems != null && contentArea.FilteredItems.Any();
+            if (contentArea?.Items == null)
+            {
+                return false;
+            }
+
+            var contentLoader = ServiceLocator.Current.GetInstance<IContentLoader>();
+            var publishedStateAssessor = ServiceLocator.Current.GetInstance<IPublishedStateAssessor>();
+            var accessEvaluator = ServiceLocator.Current.GetInstance<IContentAccessEvaluator>();
+            var principal = ServiceLocator.Current.GetInstance<IPrincipalAccessor>().Principal;
+
+            return contentArea.Items.Any(item => IsVisible(item, contentLoader, publishedStateAssessor, accessEvaluator, principal));
+        }
+
+        // CMS 13 removed ContentArea.FilteredItems. This replicates its visibility filtering
+        // (publish state, expiration and read access) so HasContent does not report items
+        // that would not actually be rendered for the current user.
+        private static bool IsVisible(
+            ContentAreaItem item,
+            IContentLoader contentLoader,
+            IPublishedStateAssessor publishedStateAssessor,
+            IContentAccessEvaluator accessEvaluator,
+            System.Security.Principal.IPrincipal principal)
+        {
+            if (item?.ContentLink == null || !contentLoader.TryGet<IContent>(item.ContentLink, out var content))
+            {
+                return false;
+            }
+
+            return publishedStateAssessor.IsPublished(content)
+                   && accessEvaluator.HasAccess(content, principal, AccessLevel.Read);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Geta.Optimizely.Extensions/Geta.Optimizely.Extensions.csproj b/src/Geta.Optimizely.Extensions/Geta.Optimizely.Extensions.csproj
index eec4c09..7a1c6d8 100644
--- a/src/Geta.Optimizely.Extensions/Geta.Optimizely.Extensions.csproj
+++ b/src/Geta.Optimizely.Extensions/Geta.Optimizely.Extensions.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <PackageId>Geta.Optimizely.Extensions</PackageId>
     <Title>Extensions and helpers library for Optimizely CMS</Title>
     <Authors>Geta Digital</Authors>
@@ -18,9 +18,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="EPiServer.CMS.AspNetCore.HtmlHelpers" Version="12.6.0" />
-    <PackageReference Include="EPiServer.CMS.UI.Core" Version="12.7.0" />
-    <PackageReference Include="Geta.Net.Extensions" Version="3.0.0" />
+    <PackageReference Include="EPiServer.CMS.AspNetCore.HtmlHelpers" Version="13.0.2" />
+    <PackageReference Include="EPiServer.CMS.UI.Core" Version="13.0.2" />
+    <PackageReference Include="Geta.Net.Extensions" Version="3.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Geta.Optimizely.Extensions/JsonExtensions.cs b/src/Geta.Optimizely.Extensions/JsonExtensions.cs
index 37ad732..50866f6 100644
--- a/src/Geta.Optimizely.Extensions/JsonExtensions.cs
+++ b/src/Geta.Optimizely.Extensions/JsonExtensions.cs
@@ -1,31 +1,27 @@
-using Newtonsoft.Json;
-using Newtonsoft.Json.Converters;
-using Newtonsoft.Json.Serialization;
+using System.Text.Json;
+using System.Text.Json.Serialization;
 
 namespace Geta.Optimizely.Extensions
 {
-    /// <summary>
-    /// Extension methods for working with JSON data
-    /// </summary>
     public static class JsonExtensions
     {
-        /// <summary>
-        /// Convert object to JSON
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <param name="obj">Object to convert</param>
-        /// <param name="includeNull">Include null property values</param>
-        /// <returns></returns>
-        public static string ToJson<T>(this T obj, bool includeNull = true)
+        private static readonly JsonSerializerOptions OptionsWithNulls = new()
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            DefaultIgnoreCondition = JsonIgnoreCondition.Never,
+            Converters = { new JsonStringEnumConverter() }
+        };
+
+        private static readonly JsonSerializerOptions OptionsWithoutNulls = new()
         {
-            var settings = new JsonSerializerSettings
-            {
-                ContractResolver = new CamelCasePropertyNamesContractResolver(),
-                Converters = new JsonConverter[] { new StringEnumConverter() },
-                NullValueHandling = includeNull ? NullValueHandling.Include : NullValueHandling.Ignore
-            };
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+            Converters = { new JsonStringEnumConverter() }
+        };
 
-            return JsonConvert.SerializeObject(obj, settings);
+        public static string ToJson<T>(this T obj, bool includeNull = true)
+        {
+            return JsonSerializer.Serialize(obj, includeNull ? OptionsWithNulls : OptionsWithoutNulls);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Geta.Optimizely.Extensions/StringExtensions.cs b/src/Geta.Optimizely.Extensions/StringExtensions.cs
index 8288f7d..61c30f4 100644
--- a/src/Geta.Optimizely.Extensions/StringExtensions.cs
+++ b/src/Geta.Optimizely.Extensions/StringExtensions.cs
@@ -1,6 +1,7 @@
-using EPiServer.Core.Html;
-using Geta.Net.Extensions;
 using System;
+using System.Net;
+using System.Text.RegularExpressions;
+using Geta.Net.Extensions;
 using Microsoft.AspNetCore.Http;
 
 namespace Geta.Optimizely.Extensions
@@ -18,9 +19,15 @@ public static class StringExtensions
         /// <returns>A string with text.</returns>
         public static string StripHtml(this string htmlText, int maxLength = 0)
         {
-            return string.IsNullOrWhiteSpace(htmlText)
-                ? htmlText
-                : TextIndexer.StripHtml(htmlText, maxLength);
+            if (string.IsNullOrWhiteSpace(htmlText))
+                return htmlText;
+
+
+            var stripped = Regex.Replace(htmlText, "<[^>]*>", string.Empty, RegexOptions.None, TimeSpan.FromSeconds(1));
+            stripped = WebUtility.HtmlDecode(stripped);
+            return maxLength > 0 && stripped.Length > maxLength
+                ? stripped[..maxLength]
+                : stripped;
         }
 
         /// <summary>
@@ -100,4 +107,4 @@ public static string AddHost(this string url, Func<Uri> getBaseUri)
             return uriBuilder.ToString();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Geta.Optimizely.Extensions/TypeExtensions.cs b/src/Geta.Optimizely.Extensions/TypeExtensions.cs
index ae86abc..193445c 100644
--- a/src/Geta.Optimizely.Extensions/TypeExtensions.cs
+++ b/src/Geta.Optimizely.Extensions/TypeExtensions.cs
@@ -16,7 +16,7 @@ public static class TypeExtensions
         /// <returns>PageType instance if found.</returns>
         public static PageType GetPageType(this Type pageType)
         {
-            return ServiceLocator.Current.GetInstance<IContentTypeRepository<PageType>>().Load(pageType);
+            return ServiceLocator.Current.GetInstance<IContentTypeRepository>().Load(pageType) as PageType;
         }
     }
 }
diff --git a/src/Geta.Optimizely.Extensions/UrlHelperExtensions.cs b/src/Geta.Optimizely.Extensions/UrlHelperExtensions.cs
index 636de0d..11ee8d2 100644
--- a/src/Geta.Optimizely.Extensions/UrlHelperExtensions.cs
+++ b/src/Geta.Optimizely.Extensions/UrlHelperExtensions.cs
@@ -1,5 +1,4 @@
-using Castle.Core.Internal;
-using EPiServer;
+using EPiServer;
 using EPiServer.Core;
 using EPiServer.ServiceLocation;
 using EPiServer.Web.Mvc.Html;
@@ -30,7 +29,7 @@ public static class UrlHelperExtensions
         public static IHtmlContent PageLinkUrl(this IUrlHelper urlHelper, PageReference pageLink, string defaultValue)
         {
             var url = urlHelper.PageLinkUrl(pageLink) as HtmlString;
-            return url == null || url.Value.IsNullOrEmpty() ? new HtmlString(defaultValue) : url;
+            return url == null || string.IsNullOrEmpty(url.Value) ? new HtmlString(defaultValue) : url;
         }
 
         /// <summary>
diff --git a/sub/geta-foundation-core b/sub/geta-foundation-core
index d71244c..40971e5 160000
--- a/sub/geta-foundation-core
+++ b/sub/geta-foundation-core
@@ -1 +1 @@
-Subproject commit d71244c7c12339a3dfb278ba15ca423768c33118
+Subproject commit 40971e5afec808e72bb3011d03d8d49125298f5c
diff --git a/test/Geta.Optimizely.Extensions.Tests/Geta.Optimizely.Extensions.Tests.csproj b/test/Geta.Optimizely.Extensions.Tests/Geta.Optimizely.Extensions.Tests.csproj
index 3d8d448..44658e2 100644
--- a/test/Geta.Optimizely.Extensions.Tests/Geta.Optimizely.Extensions.Tests.csproj
+++ b/test/Geta.Optimizely.Extensions.Tests/Geta.Optimizely.Extensions.Tests.csproj
@@ -1,26 +1,25 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Castle.Core" Version="4.4.1" />
-    <PackageReference Include="coverlet.msbuild" Version="3.1.2">
+    <PackageReference Include="Castle.Core" Version="5.2.1" />
+    <PackageReference Include="coverlet.msbuild" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
-    <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
-    <PackageReference Include="Moq" Version="4.16.1" />
-    <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="coverlet.collector" Version="3.1.2">
+    <PackageReference Include="FluentAssertions" Version="6.12.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>