diff --git a/pkgs/development/python-modules/flax/default.nix b/pkgs/development/python-modules/flax/default.nix
index 304b567170fa..0d4acac27e1b 100644
--- a/pkgs/development/python-modules/flax/default.nix
+++ b/pkgs/development/python-modules/flax/default.nix
@@ -17,13 +17,13 @@
 
 buildPythonPackage rec {
   pname = "flax";
-  version = "0.6.3";
+  version = "0.6.1";
 
   src = fetchFromGitHub {
     owner = "google";
     repo = pname;
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-4BYfrwEddA2LCMyDO6PBBYdMVTqqDxhzMCZ5JIIml3g=";
+    sha256 = "sha256-fZiODo+izOwGjCCTvi11GvUG/VQL1DV9bNXKjvIIw4A=";
   };
 
   buildInputs = [ jaxlib ];