diff --git a/pyproject.toml b/pyproject.toml
index dc88792be..2f33ee6bc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dependencies = [
     "langchain-huggingface==0.3.1",
     "langchain-ollama==0.3.10",
     "langchain_core==0.3.80",
-    "langchain-aws>=0.2.28",
+    "langchain-aws==0.2.28",
     "langgraph==0.5.3",
     "torch==2.8.0",
     "sentence-transformers==5.0.0",