diff --git a/Dockerfile.backend b/Dockerfile.backend
index b7dd859..69f90b0 100644
--- a/Dockerfile.backend
+++ b/Dockerfile.backend
@@ -1,9 +1,9 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
 USER $APP_UID
 WORKDIR /app
 EXPOSE 5000
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
 ARG BUILD_CONFIGURATION=Release
 WORKDIR /src
 COPY ["Foxnouns.Backend/Foxnouns.Backend.csproj", "Foxnouns.Backend/"]
diff --git a/Foxnouns.Backend/Controllers/Authentication/EmailAuthController.cs b/Foxnouns.Backend/Controllers/Authentication/EmailAuthController.cs
index cedf962..a3854a6 100644
--- a/Foxnouns.Backend/Controllers/Authentication/EmailAuthController.cs
+++ b/Foxnouns.Backend/Controllers/Authentication/EmailAuthController.cs
@@ -73,7 +73,7 @@ public class EmailAuthController(
     }
 
     [HttpPost("callback")]
-    public async Task<IActionResult> CallbackAsync([FromBody] CallbackRequest req)
+    public async Task<IActionResult> CallbackAsync([FromBody] EmailCallbackRequest req)
     {
         CheckRequirements();
 
diff --git a/docker/Caddyfile b/docker/Caddyfile
index 9132068..a729fa8 100644
--- a/docker/Caddyfile
+++ b/docker/Caddyfile
@@ -1,11 +1,11 @@
 # Frontend and API
-http://localhost:80 {
+http://:80 {
     reverse_proxy /api/* http://rate:5003
     reverse_proxy http://frontend:3000
 }
 
 # prns.cc (profile URL shortener)
-http://localhost:81 {
+http://:81 {
     rewrite * /sid{uri}
     reverse_proxy http://backend:5000
 }