diff --git a/backend/requirements.txt b/backend/requirements.txt
index 7534caee2..061f9a4a9 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -40,7 +40,7 @@ anthropic
 google-generativeai==0.7.2
 tiktoken
 
-langchain==0.3.7
+langchain==0.3.19
 langchain-community==0.3.18
 
 fake-useragent==1.5.1
diff --git a/pyproject.toml b/pyproject.toml
index 2631700e5..2cf87c2f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ dependencies = [
     "google-generativeai==0.7.2",
     "tiktoken",
 
-    "langchain==0.3.7",
+    "langchain==0.3.19",
     "langchain-community==0.3.18",
 
     "fake-useragent==1.5.1",