diff --git a/Dockerfile.backend b/Dockerfile.backend
index b7dd859..7353ad3 100644
--- a/Dockerfile.backend
+++ b/Dockerfile.backend
@@ -1,4 +1,4 @@
-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