diff --git a/Dockerfile b/Dockerfile
index f9071c0b4..4640b1689 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # TARGETPLATFORM and BUILDPLATFORM are automatically filled in by Docker buildx.
 # They should not be set in the global scope manually.
 
-FROM --platform=${BUILDPLATFORM} mcr.microsoft.com/dotnet/sdk:6.0 AS builder
+FROM --platform=${BUILDPLATFORM} mcr.microsoft.com/dotnet/sdk:9.0 AS builder
 
 # Copy build context
 WORKDIR /TShock