diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 69c2e24..3474ee1 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
     "openai>=1.45.0",
     "anthropic>=0.34.0",
     "google-generativeai>=0.8.0",
-    "aiobotocore>=2.15.0",
+    "aiobotocore>=3.4.0",
 
     # HTTP client (tools + internal)
     "httpx>=0.27.0",