diff --git a/.github/workflows/robot.yml b/.github/workflows/robot.yml
index 547fa466..995fc394 100644
--- a/.github/workflows/robot.yml
+++ b/.github/workflows/robot.yml
@@ -25,12 +25,9 @@ jobs:
         uses: satackey/action-docker-layer-caching@v0.0.11
         continue-on-error: true
 
-      - name: Build the app
-        run: docker-compose build
-
       - name: Start the service
         run: |
-          docker-compose up -d # --wait Wait is not available on gha
+          docker-compose up -d back postgres ingress # --wait Wait is not available on gha
 
       - name: Perform healthchecks
         run: |
diff --git a/back/Dockerfile b/back/Dockerfile
index 4655517c..3bead739 100644
--- a/back/Dockerfile
+++ b/back/Dockerfile
@@ -1,11 +1,11 @@
-# FIXME: We use the sdk 8-preview because of this issue with the 7 https://github.com/dotnet/sdk/issues/29892
-FROM mcr.microsoft.com/dotnet/sdk:8.0-preview as transcoder
+FROM mcr.microsoft.com/dotnet/sdk:7.0 as transcoder
 RUN apt-get update && apt-get install -y cmake make libavutil-dev libavcodec-dev libavformat-dev
 WORKDIR /transcoder
 COPY src/Kyoo.Transcoder .
 RUN cmake . && make -j
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0-preview as builder
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:7.0 as builder
+ARG TARGETARCH
 WORKDIR /kyoo
 
 COPY Kyoo.sln ./Kyoo.sln
@@ -18,13 +18,13 @@ COPY src/Kyoo.Host/Kyoo.Host.csproj src/Kyoo.Host/Kyoo.Host.csproj
 COPY src/Kyoo.Postgresql/Kyoo.Postgresql.csproj src/Kyoo.Postgresql/Kyoo.Postgresql.csproj
 COPY src/Kyoo.Swagger/Kyoo.Swagger.csproj src/Kyoo.Swagger/Kyoo.Swagger.csproj
 COPY tests/Kyoo.Tests/Kyoo.Tests.csproj tests/Kyoo.Tests/Kyoo.Tests.csproj
-RUN dotnet restore
+RUN dotnet restore -a $TARGETARCH
 
 COPY . .
 ARG VERSION
-RUN dotnet publish --no-restore -c Release -o /app "-p:Version=${VERSION:-"0.0.0-dev"};SkipTranscoder=true" src/Kyoo.Host
+RUN dotnet publish -a $TARGETARCH --no-restore -c Release -o /app "-p:Version=${VERSION:-"0.0.0-dev"};SkipTranscoder=true" src/Kyoo.Host
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0-preview
+FROM mcr.microsoft.com/dotnet/aspnet:7.0
 RUN apt-get update && apt-get install -y libavutil-dev libavcodec-dev libavformat-dev curl
 COPY --from=builder /app /app
 COPY --from=transcoder /transcoder/libtranscoder.so /app
diff --git a/back/src/Kyoo.Core/CoreModule.cs b/back/src/Kyoo.Core/CoreModule.cs
index e1613c5c..4160b9a5 100644
--- a/back/src/Kyoo.Core/CoreModule.cs
+++ b/back/src/Kyoo.Core/CoreModule.cs
@@ -30,6 +30,7 @@ using Microsoft.AspNetCore.Routing;
 using Microsoft.AspNetCore.StaticFiles;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
+using Newtonsoft.Json;
 using JsonOptions = Kyoo.Core.Api.JsonOptions;
 
 namespace Kyoo.Core
@@ -86,7 +87,10 @@ namespace Kyoo.Core
 				{
 					options.Filters.Add<ExceptionFilter>();
 				})
-				.AddNewtonsoftJson()
+				.AddNewtonsoftJson(x =>
+				{
+					x.SerializerSettings.DateTimeZoneHandling = DateTimeZoneHandling.Utc;
+				})
 				.AddDataAnnotations()
 				.AddControllersAsServices()
 				.AddApiExplorer()