diff --git a/FictionArchive.Service.NovelService/GraphQL/Mutation.cs b/FictionArchive.Service.NovelService/GraphQL/Mutation.cs
index b870439..af7724f 100644
--- a/FictionArchive.Service.NovelService/GraphQL/Mutation.cs
+++ b/FictionArchive.Service.NovelService/GraphQL/Mutation.cs
@@ -13,7 +13,7 @@ namespace FictionArchive.Service.NovelService.GraphQL;
 
 public class Mutation
 {
-    [Authorize(Roles = "admin")]
+    [Authorize]
     public async Task<NovelUpdateRequestedEvent> ImportNovel(string novelUrl, NovelUpdateService service)
     {
         return await service.QueueNovelImport(novelUrl);
diff --git a/FictionArchive.Service.SchedulerService/GraphQL/Mutation.cs b/FictionArchive.Service.SchedulerService/GraphQL/Mutation.cs
index 3e0ff6f..195af57 100644
--- a/FictionArchive.Service.SchedulerService/GraphQL/Mutation.cs
+++ b/FictionArchive.Service.SchedulerService/GraphQL/Mutation.cs
@@ -11,21 +11,21 @@ public class Mutation
 {
     [Error<DuplicateNameException>]
     [Error<FormatException>]
-    [Authorize(Roles = "admin")]
+    [Authorize(Roles = new[] { "admin" })]
     public async Task<SchedulerJob> ScheduleEventJob(string key, string description, string eventType, string eventData, string cronSchedule, JobManagerService jobManager)
     {
         return await jobManager.ScheduleEventJob(key, description, eventType, eventData, cronSchedule);
     }
 
     [Error<JobPersistenceException>]
-    [Authorize(Roles = "admin")]
+    [Authorize(Roles = new[] { "admin" })]
     public async Task<bool> RunJob(string jobKey, JobManagerService jobManager)
     {
         return await jobManager.TriggerJob(jobKey);
     }
 
     [Error<KeyNotFoundException>]
-    [Authorize(Roles = "admin")]
+    [Authorize(Roles = new[] { "admin" })]
     public async Task<bool> DeleteJob(string jobKey, JobManagerService jobManager)
     {
         bool deleted = await jobManager.DeleteJob(jobKey);
diff --git a/FictionArchive.Service.Shared/Extensions/AuthenticationExtensions.cs b/FictionArchive.Service.Shared/Extensions/AuthenticationExtensions.cs
index 331f9f6..eeb5503 100644
--- a/FictionArchive.Service.Shared/Extensions/AuthenticationExtensions.cs
+++ b/FictionArchive.Service.Shared/Extensions/AuthenticationExtensions.cs
@@ -3,6 +3,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Configuration;
 using Microsoft.IdentityModel.Tokens;
 using FictionArchive.Service.Shared.Models.Authentication;
+using System.Linq;
 
 namespace FictionArchive.Service.Shared.Extensions;
 
@@ -16,6 +17,8 @@ public static class AuthenticationExtensions
         {
             throw new InvalidOperationException("OIDC configuration is required but not found in app settings");
         }
+        
+        ValidateOidcConfiguration(oidcConfig);
 
         services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
             .AddJwtBearer(options =>
@@ -45,6 +48,8 @@ public static class AuthenticationExtensions
         {
             throw new InvalidOperationException("OIDC configuration is required but not found in app settings");
         }
+        
+        ValidateOidcConfiguration(oidcConfig);
 
         services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
             .AddJwtBearer(options =>
@@ -88,4 +93,29 @@ public static class AuthenticationExtensions
 
         return services;
     }
+
+    private static void ValidateOidcConfiguration(OidcConfiguration config)
+    {
+        var errors = new List<string>();
+
+        if (string.IsNullOrWhiteSpace(config.Authority))
+            errors.Add("OIDC Authority is required");
+
+        if (string.IsNullOrWhiteSpace(config.ClientId))
+            errors.Add("OIDC ClientId is required");
+
+        if (string.IsNullOrWhiteSpace(config.Audience))
+            errors.Add("OIDC Audience is required");
+
+        if (!Uri.TryCreate(config.Authority, UriKind.Absolute, out var authorityUri))
+            errors.Add($"OIDC Authority '{config.Authority}' is not a valid URI");
+        else if (!authorityUri.Scheme.Equals("https", StringComparison.OrdinalIgnoreCase) && 
+                 !authorityUri.Host.Equals("localhost", StringComparison.OrdinalIgnoreCase))
+            errors.Add("OIDC Authority must use HTTPS unless running on localhost");
+
+        if (errors.Any())
+        {
+            throw new InvalidOperationException($"OIDC configuration validation failed:{Environment.NewLine}{string.Join(Environment.NewLine, errors)}");
+        }
+    }
 }
\ No newline at end of file