diff --git a/Dockerfile b/Dockerfile
index a4bf92e..1ea6faa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
 
 WORKDIR /home/txnproc/
 COPY ["/config", "config"]
diff --git a/DockerfileWindows b/DockerfileWindows
index 00cb90c..abf6f98 100644
--- a/DockerfileWindows
+++ b/DockerfileWindows
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0-windowsservercore-ltsc2022 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0-windowsservercore-ltsc2022 AS base
 
 WORKDIR /home/txnproc/
 COPY ["/config", "config"]