diff --git a/packages/gen/pyproject.toml b/packages/gen/pyproject.toml
index 1e83b2d4..41f5bbfa 100644
--- a/packages/gen/pyproject.toml
+++ b/packages/gen/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
     "openai>=1.66.0",
     "langcodes~=3.5.1",
     "pandas>=2.2.0",
-    "langchain~=1.3.14",
+    "langchain~=1.4.0",
     "langchain-classic~=1.0.0",
     "langchain-community~=0.4.1",
     "langchain-openai~=1.6.0",
diff --git a/uv.lock b/uv.lock
index d9106452..2b441015 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1657,16 +1657,16 @@ wheels = [
 
 [[package]]
 name = "langchain"
-version = "1.3.14"
+version = "1.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "langgraph" },
     { name = "pydantic" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/29/68/a6dbad9c22df4087a0f9e79ddd46226c442b30128bfeee538d5889492a73/langchain-1.3.14.tar.gz", hash = "sha256:1b6696c72ba3bbbce54d745e0180742c9f6ece8bbc59ed5a46c3e20b9a435929", size = 645181, upload-time = "2026-07-16T13:28:18.29Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/c4/5d/0ef368fdcf5df08a394787196fb7a80f473a9c7b3fc4cd2e3b53a7a5853d/langchain-1.4.0.tar.gz", hash = "sha256:08da122a439f738f4c09a5158cfa3d2c1d8bea2d0bde7fbbf4aeb4d7f7fd9d80", size = 729354, upload-time = "2026-09-03T16:59:32.442Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a9/ec/0f942e78a621f8e3162ff1ed24284f469aaf51fb4607ee5831c626f2b2bc/langchain-1.3.14-py3-none-any.whl", hash = "sha256:4d10dbe91005952cddd56d0dc77aa108964da6bae90ab20063653957e901f782", size = 139560, upload-time = "2026-07-16T13:28:16.498Z" },
+    { url = "https://files.pythonhosted.org/packages/92/fa/7da07d9977a5e292ef602c1bb911514ff8206e85dc09a66961874345d57a/langchain-1.4.0-py3-none-any.whl", hash = "sha256:af1dc0161d30944a52ec7844d9bf890d0497b12ec0703069f3503b4003cbbac3", size = 161534, upload-time = "2026-09-03T16:59:31.154Z" },
 ]
 
 [[package]]
@@ -1815,7 +1815,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.2.10"
+version = "1.2.11"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
@@ -1825,9 +1825,9 @@ dependencies = [
     { name = "pydantic" },
     { name = "xxhash" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/70/1d/a32f3caf4b3d60651656c0d64976b48d168653e81c71bb7512e9a31541aa/langgraph-1.2.10.tar.gz", hash = "sha256:05a183a746ed570a06c7c1b879920163509a75df9e44e92dd2238218d677fd37", size = 723404, upload-time = "2026-07-28T18:33:51.441Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/56/0d/c8e7ee98896659e1b6555db0ab115a9ca899844744645d5d894032bab1d7/langgraph-1.2.11.tar.gz", hash = "sha256:9ecfe11e50d338b34b15cf4d8a442642de103e8ae6971320efba84e4542eb363", size = 725753, upload-time = "2026-08-11T14:00:36.945Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/e2/4d/3fc3e2535ee2c731130d71371848ebc6d4a9d2e8ae6060b11987ba134951/langgraph-1.2.10-py3-none-any.whl", hash = "sha256:52c48bd42fa31a1de0e1c0f0ebfe342e11ca2957b8b3563f83dbd60d8e30f921", size = 247753, upload-time = "2026-07-28T18:33:50.028Z" },
+    { url = "https://files.pythonhosted.org/packages/0a/7f/c5c30e4be99ff821029c7ac872a480676bb179c9f3df85ea3f38d13f86d4/langgraph-1.2.11-py3-none-any.whl", hash = "sha256:8bab70de7b2d00b5300fb289bcf38d8b241400f3184c1e95e8ce706fb0e8686b", size = 248854, upload-time = "2026-08-11T14:00:35.494Z" },
 ]
 
 [[package]]
@@ -4280,7 +4280,7 @@ requires-dist = [
     { name = "google-genai", marker = "extra == 'google'", specifier = "~=2.22.0" },
     { name = "h11", specifier = ">=0.16.0" },
     { name = "httpx", specifier = ">=0.27.0" },
-    { name = "langchain", specifier = "~=1.3.14" },
+    { name = "langchain", specifier = "~=1.4.0" },
     { name = "langchain-aws", marker = "extra == 'amazon'", specifier = "~=1.7.0" },
     { name = "langchain-classic", specifier = "~=1.0.0" },
     { name = "langchain-community", specifier = "~=0.4.1" },