diff --git a/libs/langchain/dev.Dockerfile b/libs/langchain/dev.Dockerfile
index 696f8fdb023..3cef968e31f 100644
--- a/libs/langchain/dev.Dockerfile
+++ b/libs/langchain/dev.Dockerfile
@@ -35,7 +35,7 @@ FROM langchain-dev-base AS langchain-dev-dependencies
 ARG PYTHON_VIRTUALENV_HOME
 
 # Copy only the dependency files for installation
-COPY libs/langchain/pyproject.toml libs/langchain/poetry.toml ./
+COPY libs/langchain/pyproject.toml libs/langchain/poetry.toml libs/langchain/poetry.lock ./
 
 # Copy the langchain library for installation
 COPY libs/langchain/ libs/langchain/