diff --git a/pkgs/development/python-modules/langgraph-sdk/default.nix b/pkgs/development/python-modules/langgraph-sdk/default.nix
index 12e1af0a6098..c5687317824c 100644
--- a/pkgs/development/python-modules/langgraph-sdk/default.nix
+++ b/pkgs/development/python-modules/langgraph-sdk/default.nix
@@ -9,8 +9,11 @@
   # dependencies
   httpx,
   httpx-sse,
+  langchain-core,
+  langchain-protocol,
   orjson,
   typing-extensions,
+  websockets,
 
   # passthru
   gitUpdater,
@@ -18,25 +21,31 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langgraph-sdk";
-  version = "0.3.15";
+  version = "0.4.2";
   pyproject = true;
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = "sdk==${finalAttrs.version}";
-    hash = "sha256-P4SbQK6lFG572WKxisnNn/ZiHcMYBBM/vcBB9N6xpfo=";
+    hash = "sha256-30BY7f8m3YiqEBhb3+TQYTW0N40xI9kTQbMTh4BwcyU=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/sdk-py";
 
   build-system = [ hatchling ];
 
+  pythonRelaxDeps = [ "websockets" ];
+
   dependencies = [
     httpx
     httpx-sse
+    langchain-core
+    langchain-protocol
     orjson
     typing-extensions
+    websockets
   ];
 
   disabledTests = [ "test_aevaluate_results" ]; # Compares execution time to magic number