diff --git a/images/sandbox/Containerfile b/images/sandbox/Containerfile
index 7bf91c85e..153f2304f 100644
--- a/images/sandbox/Containerfile
+++ b/images/sandbox/Containerfile
@@ -49,7 +49,7 @@ RUN apt-get update \
 #
 # To update: bump CLAUDE_CODE_VERSION; renovate tracks this ARG via
 # a customManagers regex entry in renovate.json.
-ARG CLAUDE_CODE_VERSION=2.1.226
+ARG CLAUDE_CODE_VERSION=2.1.233
 RUN npm install -g @anthropic-ai/claude-code@${CLAUDE_CODE_VERSION}
 
 # ---------------------------------------------------------------------------