diff --git a/pkgs/development/python-modules/langchain-google-genai/default.nix b/pkgs/development/python-modules/langchain-google-genai/default.nix
index e69f012c8b6b..73d6afc62d6b 100644
--- a/pkgs/development/python-modules/langchain-google-genai/default.nix
+++ b/pkgs/development/python-modules/langchain-google-genai/default.nix
@@ -29,14 +29,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-google-genai";
-  version = "4.2.0";
+  version = "4.2.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-google";
     tag = "libs/genai/v${version}";
-    hash = "sha256-1WL5pasYHKzXRbOGo910SP3YP6eg00aFoOd7RTwV++A=";
+    hash = "sha256-aNmYj5eOWDgHYlSLElwQXQByQg8gHqiybM19JQlkluk=";
   };
 
   sourceRoot = "${src.name}/libs/genai";