diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index 1ce07affc04d..c2b31f9710ff 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -21,7 +21,6 @@
   blockbuster,
   freezegun,
   grandalf,
-  httpx,
   langchain-core,
   langchain-tests,
   numpy,
@@ -35,19 +34,19 @@
   gitUpdater,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "langchain-core";
-  version = "1.2.12";
+  version = "1.2.17";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
-    tag = "langchain-core==${version}";
-    hash = "sha256-KSZhuABk5OpfJ1e1/h/Vr7RA5f9eSK7VBJKaJ5i6xv4=";
+    tag = "langchain-core==${finalAttrs.version}";
+    hash = "sha256-vuMVNRQSgj3o1KRBgspUglLECPF+YYWpH4/e5iE8ZYY=";
   };
 
-  sourceRoot = "${src.name}/libs/core";
+  sourceRoot = "${finalAttrs.src.name}/libs/core";
 
   build-system = [ hatchling ];
 
@@ -136,11 +135,11 @@ buildPythonPackage rec {
   meta = {
     description = "Building applications with LLMs through composability";
     homepage = "https://github.com/langchain-ai/langchain/tree/master/libs/core";
-    changelog = "https://github.com/langchain-ai/langchain/releases/tag/${src.tag}";
+    changelog = "https://github.com/langchain-ai/langchain/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [
       natsukium
       sarahec
     ];
   };
-}
+})