diff --git a/pyproject.toml b/pyproject.toml
index 204b5c5..69d40aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
     "beautifulsoup4==4.13.3",
     "certifi==2025.1.31",
     "Jinja2==3.1.6",
-    "langchain==0.3.30",
+    "langchain==1.3.9",
     "langchain-anthropic==0.3.10",
     "lxml==6.1.0",
     "MarkupSafe==3.0.2",
diff --git a/requirements.txt b/requirements.txt
index c64e2bb..23ae586 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 beautifulsoup4==4.13.3
 certifi==2025.1.31
 Jinja2==3.1.6
-langchain==0.3.30
+langchain==1.3.9
 langchain-anthropic==0.3.10
 lxml==6.1.0
 MarkupSafe==3.0.2