diff --git a/apps/backend/package.json b/apps/backend/package.json
index 8f7bbdea..9ef02fb6 100644
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -12,7 +12,7 @@
     "seed": "tsx src/seed.ts"
   },
   "dependencies": {
-    "@anthropic-ai/sdk": "^0.90.0",
+    "@anthropic-ai/sdk": "^0.91.1",
     "@fastify/cors": "^11.2.0",
     "@fastify/helmet": "^13.0.2",
     "@fastify/jwt": "10.0.0",