diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 05ddebad2..d40ad5e94 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,5 +1,5 @@
 # Refer to https://hub.docker.com/_/microsoft-dotnet-sdk for available versions
-FROM mcr.microsoft.com/dotnet/sdk:9.0.303-noble@sha256:af75742bd2f6fd148504951b57a983bc410191729bf543eae467528d1bc175e5
+FROM mcr.microsoft.com/dotnet/sdk:9.0.304-noble@sha256:0b7186a7247bf8c07085fd700613bb0425a6f8f6467a0342c12a535e767da803
 
 # Installing mono makes `dotnet test` work without errors even for net472.
 # But installing it takes a long time, so it's excluded by default.
diff --git a/global.json b/global.json
index 53871ffc1..f8dd2c724 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.303",
+    "version": "9.0.304",
     "rollForward": "patch",
     "allowPrerelease": false
   },