diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index f0cc30d47699..edd0a43514cf 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -46,14 +46,14 @@
 
 buildPythonPackage rec {
   pname = "langchain";
-  version = "1.1.3";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain==${version}";
-    hash = "sha256-oW1Gn7ChRwUThrnkNBcGKn96sqRO84rSf75J2bNdBMY=";
+    hash = "sha256-DximXCwrDSUVXZenUrubuGcxdnRCPCPMgdW9UJnkGnE=";
   };
 
   sourceRoot = "${src.name}/libs/langchain_v1";