diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index ca04949..c3fc553 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -1,7 +1,7 @@
 name: Build and run unit tests
 
 env:
-  DOTNET_VERSION: '9.x'
+  DOTNET_VERSION: '10.x'
 
 on:
   push:
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5 
+      - uses: actions/checkout@v6 
 
       - name: Set up .NET Core
         uses: actions/setup-dotnet@v5
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7364687..505743f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,7 +3,7 @@ name: Release CI/CD
 env:
   AZURE_WEBAPP_NAME: app-open5etools 
   AZURE_WEBAPP_PACKAGE_PATH: '.'    
-  DOTNET_VERSION: '9.x'    
+  DOTNET_VERSION: '10.x'    
 
 on:
   push:
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up .NET Core
         uses: actions/setup-dotnet@v5
diff --git a/Directory.Build.props b/Directory.Build.props
index 48051fb..c4d6973 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <LangVersion>latest</LangVersion>
         <ImplicitUsings>true</ImplicitUsings>
         <Nullable>enable</Nullable>
diff --git a/Directory.Packages.props b/Directory.Packages.props
index c13fcff..23000a3 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -7,24 +7,23 @@
     <PackageVersion Include="LigerShark.WebOptimizer.Core" Version="3.0.477" />
     <PackageVersion Include="Mapster" Version="7.4.0" />
     <PackageVersion Include="Mapster.DependencyInjection" Version="1.0.1" />
-    <PackageVersion Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.SQLite" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="9.0.10" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
+    <PackageVersion Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.SQLite" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="10.0.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageVersion Include="Microsoft.Web.LibraryManager.Build" Version="3.0.71" />
     <PackageVersion Include="Serilog.AspNetCore" Version="9.0.0" />
     <PackageVersion Include="Serilog.Settings.Configuration" Version="9.0.0" />
     <PackageVersion Include="Serilog.Sinks.File" Version="7.0.0" />
-    <PackageVersion Include="Serilog.Sinks.MSSqlServer" Version="9.0.1" />
-    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.14.0" />
-    <PackageVersion Include="System.Text.Json" Version="9.0.10" />
+    <PackageVersion Include="Serilog.Sinks.MSSqlServer" Version="9.0.2" />
+    <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.15.0" />
     <PackageVersion Include="Shouldly" Version="4.3.0" />
-    <PackageVersion Include="xunit.v3" Version="3.1.0" />
+    <PackageVersion Include="xunit.v3" Version="3.2.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="coverlet.collector" Version="6.0.4" />
     <PackageVersion Include="X.PagedList" Version="10.5.9" />
diff --git a/README.md b/README.md
index 9bd0814..a8da0a9 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ This repo is for playing around with DnD5E SRD materials, trying out some techno
 
 ## Prerequisites
 
-You have .NET 9 SDK installed.
+You have .NET 10 SDK installed.
 
 ## Get the code
 
diff --git a/src/Open5ETools.Core/Common/Exceptions/ServiceException.cs b/src/Open5ETools.Core/Common/Exceptions/ServiceException.cs
index 9f05c4b..1401045 100644
--- a/src/Open5ETools.Core/Common/Exceptions/ServiceException.cs
+++ b/src/Open5ETools.Core/Common/Exceptions/ServiceException.cs
@@ -2,6 +2,7 @@
 
 public class ServiceException : Exception
 {
+    public const string GeneralError = "GeneralError";
     public const string GeneralAggregateError = "GeneralAggregateError";
     public const string EntityNotFoundException = "EntityNotFoundException";
     public const string RequiredValidation = "RequiredValidation";
@@ -9,11 +10,11 @@ public class ServiceException : Exception
 
     public object[]? Args { get; }
 
-    public string? Field { get; }
+    public string Field { get; }
 
     public ServiceException(string message, params object[] args) : base(message)
     {
-        Field = null;
+        Field = string.Empty;
         Args = args;
     }
 
@@ -26,7 +27,7 @@ public ServiceException(string message, string field, params object[] args) : ba
     public ServiceException(string message, Exception innerException, params object[] args) : base(message,
         innerException)
     {
-        Field = null;
+        Field = string.Empty;
         Args = args;
     }
 
diff --git a/src/Open5ETools.Core/Common/Helpers/PasswordHelper.cs b/src/Open5ETools.Core/Common/Helpers/PasswordHelper.cs
index 7f5f69c..f17838f 100644
--- a/src/Open5ETools.Core/Common/Helpers/PasswordHelper.cs
+++ b/src/Open5ETools.Core/Common/Helpers/PasswordHelper.cs
@@ -4,16 +4,20 @@ namespace Open5ETools.Core.Common.Helpers;
 
 public static class PasswordHelper
 {
+    private const int Iterations = 10000;
+    private const int HashLength = 20;
+    private const int SaltLength = 16;
+    private static readonly HashAlgorithmName HashAlgorithmName = HashAlgorithmName.SHA512;
+
     public static string EncryptPassword(string password)
     {
         using var randomNumberGenerator = RandomNumberGenerator.Create();
-        var salt = new byte[16];
+        var salt = new byte[SaltLength];
         randomNumberGenerator.GetBytes(salt);
-        using var pbkdf2 = new Rfc2898DeriveBytes(password, salt, 10000, HashAlgorithmName.SHA512);
-        var hash = pbkdf2.GetBytes(20);
-        var hashBytes = new byte[36];
-        Array.Copy(salt, 0, hashBytes, 0, 16);
-        Array.Copy(hash, 0, hashBytes, 16, 20);
+        var hash = Rfc2898DeriveBytes.Pbkdf2(password, salt, Iterations, HashAlgorithmName, HashLength);
+        var hashBytes = new byte[SaltLength + HashLength];
+        Array.Copy(salt, 0, hashBytes, 0, SaltLength);
+        Array.Copy(hash, 0, hashBytes, SaltLength, HashLength);
         return Convert.ToBase64String(hashBytes);
     }
 
@@ -21,14 +25,13 @@ public static bool CheckPassword(string savedPasswordHash, string password)
     {
         var result = true;
         var hashBytes = Convert.FromBase64String(savedPasswordHash);
-        var salt = new byte[16];
-        Array.Copy(hashBytes, 0, salt, 0, 16);
-        using var pbkdf2 = new Rfc2898DeriveBytes(password, salt, 10000, HashAlgorithmName.SHA512);
-        var hash = pbkdf2.GetBytes(20);
+        var salt = new byte[SaltLength];
+        Array.Copy(hashBytes, 0, salt, 0, SaltLength);
+        var hash = Rfc2898DeriveBytes.Pbkdf2(password, salt, Iterations, HashAlgorithmName, HashLength);
 
-        for (var i = 0; i < 20; i++)
+        for (var i = 0; i < HashLength; i++)
         {
-            if (hashBytes[i + 16] == hash[i])
+            if (hashBytes[i + SaltLength] == hash[i])
                 continue;
             result = false;
             break;
diff --git a/src/Open5ETools.Core/Open5ETools.Core.csproj b/src/Open5ETools.Core/Open5ETools.Core.csproj
index 8364213..68ba417 100644
--- a/src/Open5ETools.Core/Open5ETools.Core.csproj
+++ b/src/Open5ETools.Core/Open5ETools.Core.csproj
@@ -3,7 +3,6 @@
         <PackageReference Include="Mapster"/>
         <PackageReference Include="Mapster.DependencyInjection"/>
         <PackageReference Include="Microsoft.EntityFrameworkCore"/>
-        <PackageReference Include="System.Text.Json"/>
         <PackageReference Include="Serilog.AspNetCore"/>
         <PackageReference Include="Serilog.Settings.Configuration"/>
         <PackageReference Include="Serilog.Sinks.File"/>
diff --git a/src/Open5ETools.Web/Controllers/Web/DungeonController.cs b/src/Open5ETools.Web/Controllers/Web/DungeonController.cs
index 408cc58..b995528 100644
--- a/src/Open5ETools.Web/Controllers/Web/DungeonController.cs
+++ b/src/Open5ETools.Web/Controllers/Web/DungeonController.cs
@@ -11,6 +11,7 @@
 using System.Text.Json;
 using Open5ETools.Core.Common.Exceptions;
 using Open5ETools.Resources;
+using Open5ETools.Web.Extensions;
 
 namespace Open5ETools.Web.Controllers.Web;
 
@@ -70,7 +71,7 @@ public async Task<IActionResult> Delete(int id, CancellationToken cancellationTo
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Error deleting dungeon.");
+            this.HandleException(ex, _logger, "Error deleting dungeon.");
         }
 
         return RedirectToAction(nameof(Index));
@@ -109,7 +110,7 @@ await _dungeonService.RenameDungeonAsync(model.Id, model.UserId, model.NewDungeo
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Error renaming dungeon.");
+            this.HandleException(ex, _logger, "Error renaming dungeon.");
         }
 
         return View(model);
@@ -125,7 +126,7 @@ public async Task<IActionResult> DeleteOption(int id, CancellationToken cancella
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Error deleting dungeon option.");
+            this.HandleException(ex, _logger, "Error deleting dungeon option.");
         }
 
         return RedirectToAction(nameof(Index));
@@ -168,7 +169,7 @@ public async Task<IActionResult> Create(DungeonOptionCreateViewModel model, Canc
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error creating dungeon.");
+                this.HandleException(ex, _logger, "Error creating dungeon.");
             }
         }
 
diff --git a/src/Open5ETools.Web/Controllers/Web/ProfileController.cs b/src/Open5ETools.Web/Controllers/Web/ProfileController.cs
index cea604c..aee4621 100644
--- a/src/Open5ETools.Web/Controllers/Web/ProfileController.cs
+++ b/src/Open5ETools.Web/Controllers/Web/ProfileController.cs
@@ -3,12 +3,14 @@
 using Microsoft.AspNetCore.Mvc;
 using Open5ETools.Core.Common.Interfaces.Services;
 using Open5ETools.Core.Common.Models.Services;
+using Open5ETools.Web.Extensions;
 using Open5ETools.Web.Models.Profile;
 
 namespace Open5ETools.Web.Controllers.Web;
 
 [Authorize]
-public class ProfileController(IUserService userService,
+public class ProfileController(
+    IUserService userService,
     ICurrentUserService currentUserService,
     IMapper mapper,
     ILogger<ProfileController> logger) : Controller
@@ -34,7 +36,8 @@ public IActionResult ChangePassword()
 
     [HttpPost]
     [ValidateAntiForgeryToken]
-    public async Task<IActionResult> ChangePassword(ProfileChangePasswordModel model, CancellationToken cancellationToken)
+    public async Task<IActionResult> ChangePassword(ProfileChangePasswordModel model,
+        CancellationToken cancellationToken)
     {
         if (ModelState.IsValid)
         {
@@ -45,10 +48,10 @@ public async Task<IActionResult> ChangePassword(ProfileChangePasswordModel model
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error changing password.");
-                ModelState.AddModelError("", ex.Message);
+                this.HandleException(ex, _logger, "Error changing password.");
             }
         }
+
         return View(model);
     }
 }
\ No newline at end of file
diff --git a/src/Open5ETools.Web/Controllers/Web/UserController.cs b/src/Open5ETools.Web/Controllers/Web/UserController.cs
index 726d569..533b8f9 100644
--- a/src/Open5ETools.Web/Controllers/Web/UserController.cs
+++ b/src/Open5ETools.Web/Controllers/Web/UserController.cs
@@ -4,6 +4,7 @@
 using Open5ETools.Core.Common.Interfaces.Services;
 using Open5ETools.Core.Common.Models.Services;
 using Open5ETools.Core.Domain;
+using Open5ETools.Web.Extensions;
 using Open5ETools.Web.Models.User;
 
 namespace Open5ETools.Web.Controllers.Web;
@@ -44,10 +45,10 @@ public async Task<IActionResult> Create(UserCreateViewModel model, CancellationT
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error creating user.");
-                ModelState.AddModelError("", ex.Message);
+                this.HandleException(ex, _logger, "Error creating user.");
             }
         }
+
         return View(model);
     }
 
@@ -73,10 +74,10 @@ public async Task<IActionResult> Edit(UserEditViewModel model, CancellationToken
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error editing user.");
-                ModelState.AddModelError("", ex.Message);
+                this.HandleException(ex, _logger, "Error editing user.");
             }
         }
+
         return View(model);
     }
 
@@ -90,8 +91,9 @@ public async Task<IActionResult> Delete(int id, CancellationToken cancellationTo
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Error deleting user.");
+            this.HandleException(ex, _logger, "Error deleting user.");
         }
+
         return RedirectToAction("Index");
     }
 
@@ -105,8 +107,9 @@ public async Task<IActionResult> Restore(int id, CancellationToken cancellationT
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Error restoring user.");
+            this.HandleException(ex, _logger, "Error restoring user.");
         }
+
         return RedirectToAction("Index");
     }
 }
\ No newline at end of file
diff --git a/src/Open5ETools.Web/Dockerfile b/src/Open5ETools.Web/Dockerfile
index e7d8592..96867dc 100644
--- a/src/Open5ETools.Web/Dockerfile
+++ b/src/Open5ETools.Web/Dockerfile
@@ -1,11 +1,11 @@
-FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
 WORKDIR /app
 COPY . ./
 
 RUN dotnet restore ./src/Open5ETools.Web/Open5ETools.Web.csproj
 RUN dotnet publish "src/Open5ETools.Web/Open5ETools.Web.csproj" -c Release -o out
 
-FROM mcr.microsoft.com/dotnet/aspnet:9.0
+FROM mcr.microsoft.com/dotnet/aspnet:10.0
 WORKDIR /app
 COPY --from=build /app/out ./
 
diff --git a/src/Open5ETools.Web/Extensions/ControllerExtensions.cs b/src/Open5ETools.Web/Extensions/ControllerExtensions.cs
new file mode 100644
index 0000000..d550ffd
--- /dev/null
+++ b/src/Open5ETools.Web/Extensions/ControllerExtensions.cs
@@ -0,0 +1,33 @@
+using Microsoft.AspNetCore.Http.Extensions;
+using Microsoft.AspNetCore.Mvc;
+using Open5ETools.Core.Common.Exceptions;
+
+namespace Open5ETools.Web.Extensions;
+
+public static class ControllerExtensions
+{
+    public static void HandleException(this Controller controller, Exception ex, ILogger logger,
+        string? defaultError = null)
+    {
+        switch (ex)
+        {
+            case ServiceAggregateException ae:
+            {
+                foreach (var exception in ae.GetInnerExceptions())
+                {
+                    controller.ModelState.AddModelError(exception.Field, exception.Message);
+                }
+
+                break;
+            }
+            case ServiceException e:
+                controller.ModelState.AddModelError(e.Field, e.Message);
+                break;
+            default:
+                logger.LogError(ex, "{GetDisplayUrl}: {DefaultError}", controller.Request.GetDisplayUrl(),
+                    defaultError ?? ServiceException.GeneralError);
+                controller.ModelState.AddModelError(string.Empty, defaultError ?? ServiceException.GeneralError);
+                break;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Open5ETools.Web/Open5ETools.Web.csproj b/src/Open5ETools.Web/Open5ETools.Web.csproj
index aab67f2..4406d08 100644
--- a/src/Open5ETools.Web/Open5ETools.Web.csproj
+++ b/src/Open5ETools.Web/Open5ETools.Web.csproj
@@ -2,7 +2,7 @@
     <PropertyGroup>
         <TieredCompilation>true</TieredCompilation>
         <PreserveCompilationReferences>true</PreserveCompilationReferences>
-        <AssemblyVersion>1.0.3.2</AssemblyVersion>
+        <AssemblyVersion>1.0.4.0</AssemblyVersion>
     </PropertyGroup>
     <ItemGroup>
         <PackageReference Include="IdentityModel"/>