diff --git a/src/Radarr.Http/Authentication/ApiKeyAuthenticationHandler.cs b/src/Radarr.Http/Authentication/ApiKeyAuthenticationHandler.cs
index 8de970ffe..e934cc84e 100644
--- a/src/Radarr.Http/Authentication/ApiKeyAuthenticationHandler.cs
+++ b/src/Radarr.Http/Authentication/ApiKeyAuthenticationHandler.cs
@@ -27,9 +27,8 @@ namespace Radarr.Http.Authentication
         public ApiKeyAuthenticationHandler(IOptionsMonitor<ApiKeyAuthenticationOptions> options,
             ILoggerFactory logger,
             UrlEncoder encoder,
-            ISystemClock clock,
             IConfigFileProvider config)
-            : base(options, logger, encoder, clock)
+            : base(options, logger, encoder)
         {
             _apiKey = config.ApiKey;
         }
diff --git a/src/Radarr.Http/Authentication/BasicAuthenticationHandler.cs b/src/Radarr.Http/Authentication/BasicAuthenticationHandler.cs
index 95f67fbad..6acf888cb 100644
--- a/src/Radarr.Http/Authentication/BasicAuthenticationHandler.cs
+++ b/src/Radarr.Http/Authentication/BasicAuthenticationHandler.cs
@@ -6,6 +6,7 @@ using System.Text.Encodings.Web;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using NzbDrone.Common.EnvironmentInfo;
@@ -20,9 +21,8 @@ namespace Radarr.Http.Authentication
         public BasicAuthenticationHandler(IAuthenticationService authService,
             IOptionsMonitor<AuthenticationSchemeOptions> options,
             ILoggerFactory logger,
-            UrlEncoder encoder,
-            ISystemClock clock)
-            : base(options, logger, encoder, clock)
+            UrlEncoder encoder)
+            : base(options, logger, encoder)
         {
             _authService = authService;
         }
@@ -71,7 +71,7 @@ namespace Radarr.Http.Authentication
 
         protected override Task HandleChallengeAsync(AuthenticationProperties properties)
         {
-            Response.Headers.Add("WWW-Authenticate", $"Basic realm=\"{BuildInfo.AppName}\"");
+            Response.Headers.Append("WWW-Authenticate", $"Basic realm=\"{BuildInfo.AppName}\"");
             Response.StatusCode = 401;
             return Task.CompletedTask;
         }
diff --git a/src/Radarr.Http/Authentication/NoAuthenticationHandler.cs b/src/Radarr.Http/Authentication/NoAuthenticationHandler.cs
index 29449c7e0..3d8ff03c4 100644
--- a/src/Radarr.Http/Authentication/NoAuthenticationHandler.cs
+++ b/src/Radarr.Http/Authentication/NoAuthenticationHandler.cs
@@ -13,9 +13,8 @@ namespace Radarr.Http.Authentication
     {
         public NoAuthenticationHandler(IOptionsMonitor<AuthenticationSchemeOptions> options,
             ILoggerFactory logger,
-            UrlEncoder encoder,
-            ISystemClock clock)
-            : base(options, logger, encoder, clock)
+            UrlEncoder encoder)
+            : base(options, logger, encoder)
         {
         }
 
diff --git a/src/Radarr.Http/Middleware/VersionMiddleware.cs b/src/Radarr.Http/Middleware/VersionMiddleware.cs
index c3019ac3f..41e76fd7c 100644
--- a/src/Radarr.Http/Middleware/VersionMiddleware.cs
+++ b/src/Radarr.Http/Middleware/VersionMiddleware.cs
@@ -22,7 +22,7 @@ namespace Radarr.Http.Middleware
         {
             if (context.Request.IsApiRequest() && !context.Response.Headers.ContainsKey(VERSIONHEADER))
             {
-                context.Response.Headers.Add(VERSIONHEADER, _version);
+                context.Response.Headers.Append(VERSIONHEADER, _version);
             }
 
             await _next(context);