diff --git a/pkgs/development/python-modules/flax/default.nix b/pkgs/development/python-modules/flax/default.nix
index 57f649c2d58b..e96da46fe386 100644
--- a/pkgs/development/python-modules/flax/default.nix
+++ b/pkgs/development/python-modules/flax/default.nix
@@ -38,14 +38,14 @@
 
 buildPythonPackage rec {
   pname = "flax";
-  version = "0.12.1";
+  version = "0.12.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "google";
     repo = "flax";
     tag = "v${version}";
-    hash = "sha256-AUgNU1ww1Ic+lfdHtdP4fdFuvIatAXqs7AX615aVPKM=";
+    hash = "sha256-Wdfc35/iah98C5WNYZWiAd2FJUJlyGLJ8xELpuYD3GU=";
   };
 
   build-system = [