diff --git a/hm-langchain/applications/chat-pdf/poetry.lock b/hm-langchain/applications/chat-pdf/poetry.lock
index 9894a71745..e67ba49d4f 100644
--- a/hm-langchain/applications/chat-pdf/poetry.lock
+++ b/hm-langchain/applications/chat-pdf/poetry.lock
@@ -932,13 +932,13 @@ files = [
 
 [[package]]
 name = "langchain"
-version = "0.0.312"
+version = "0.0.313"
 description = "Building applications with LLMs through composability"
 optional = false
 python-versions = ">=3.8.1,<4.0"
 files = [
-    {file = "langchain-0.0.312-py3-none-any.whl", hash = "sha256:2c7ea6e80195b8747c25ca4b905bd4814f26f47719a27edcb369cb6cd2186df3"},
-    {file = "langchain-0.0.312.tar.gz", hash = "sha256:4629233c158f23dcfb0cbc249b27d7d8bde1e71ce1d8972d53ae54c7504fc78a"},
+    {file = "langchain-0.0.313-py3-none-any.whl", hash = "sha256:12d6797797e4b91e715a449da7eab2a094157180112680fdfaed0ae7c1614481"},
+    {file = "langchain-0.0.313.tar.gz", hash = "sha256:6ad3e366f8cc2ef97a63aecc86e265cc261f04e2bc5e0d3ef79fc99a8cd81248"},
 ]
 
 [package.dependencies]
@@ -2270,4 +2270,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "3.12.x"
-content-hash = "36bc8585604db4b4814e6c17001911d05e7c3ed182e1f47ef6c3d0f1ef66443a"
+content-hash = "2e308842a4a0896b4993ad11547d6bd79333a5348f23484b8bab8ba72a36f2bb"
diff --git a/hm-langchain/applications/chat-pdf/pyproject.toml b/hm-langchain/applications/chat-pdf/pyproject.toml
index 4612031e49..bd3d477f1a 100644
--- a/hm-langchain/applications/chat-pdf/pyproject.toml
+++ b/hm-langchain/applications/chat-pdf/pyproject.toml
@@ -8,7 +8,7 @@ authors = ["Hongbo Miao"]
 python = "3.12.x"
 chromadb = "0.4.14"
 gpt4all = "1.0.12"
-langchain = "0.0.312"
+langchain = "0.0.313"
 pypdf = "3.16.4"
 
 [tool.poetry.group.dev.dependencies]