diff --git a/libs/core/pyproject.toml b/libs/core/pyproject.toml
index de0857d933d..634d80e2fb7 100644
--- a/libs/core/pyproject.toml
+++ b/libs/core/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langchain-core"
-version = "0.1.41"
+version = "0.1.42-rc.1"
 description = "Building applications with LLMs through composability"
 authors = []
 license = "MIT"