diff --git a/libs/langgraph/pyproject.toml b/libs/langgraph/pyproject.toml
index 811c0a195..c8e162a2f 100644
--- a/libs/langgraph/pyproject.toml
+++ b/libs/langgraph/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph"
-version = "0.5.2"
+version = "1.0.0a1"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.9"
diff --git a/libs/langgraph/uv.lock b/libs/langgraph/uv.lock
index 9fcc5350f..bc756b96f 100644
--- a/libs/langgraph/uv.lock
+++ b/libs/langgraph/uv.lock
@@ -1192,7 +1192,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "0.5.2"
+version = "1.0.0a1"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/prebuilt/uv.lock b/libs/prebuilt/uv.lock
index c7fc94f57..72ca44a4e 100644
--- a/libs/prebuilt/uv.lock
+++ b/libs/prebuilt/uv.lock
@@ -316,7 +316,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "0.5.2"
+version = "1.0.0a1"
 source = { editable = "../langgraph" }
 dependencies = [
     { name = "langchain-core" },