diff --git a/implementations/dotnet-corvus-jsonschema/Dockerfile b/implementations/dotnet-corvus-jsonschema/Dockerfile
index f210d56f7..387337d3e 100644
--- a/implementations/dotnet-corvus-jsonschema/Dockerfile
+++ b/implementations/dotnet-corvus-jsonschema/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:9.0.200 AS build
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:9.0.203 AS build
 ARG TARGETARCH
 
 WORKDIR /source