diff --git a/Dockerfile b/Dockerfile
index 88e9858..96e7c20 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # Contrast Security, Inc licenses this file to you under the Apache 2.0 License.
 # See the LICENSE file in the project root for more information.
 
-FROM mcr.microsoft.com/dotnet/aspnet:6.0.35-bookworm-slim AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0.0-bookworm-slim AS base
 
 # To aid in debugging.
 RUN set -xe \