diff --git a/backend/KasseAPI_Final.csproj b/backend/KasseAPI_Final.csproj
index e4a8d07b..c5ac9e0b 100644
--- a/backend/KasseAPI_Final.csproj
+++ b/backend/KasseAPI_Final.csproj
@@ -51,7 +51,7 @@
     <PackageReference Include="Microsoft.Extensions.Caching.StackExchangeRedis" Version="10.0.10" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.3" />
     <!-- Stay on 3.1.x: ImageSharp 4.0 requires a Six Labors license key at build for direct refs. -->
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.12" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="4.0.0" />
     <PackageReference Include="QuestPDF" Version="2026.7.1" />
     <PackageReference Include="prometheus-net.AspNetCore" Version="8.2.1" />
     <PackageReference Include="QRCoder" Version="1.8.0" />