diff --git a/requirements.txt b/requirements.txt
index 082781e..567877e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ litellm>=1.83.0
 tiktoken>=0.12.0
 
 # --- LangChain (used by some downstream callers) -------------------------
-langchain>=1.2.0
+langchain>=1.3.0
 langchain-anthropic>=1.4.0
 langchain-community>=0.4.0
 langchain-google-genai>=4.2.0