diff --git a/pkgs/development/python-modules/growattserver/default.nix b/pkgs/development/python-modules/growattserver/default.nix
index ce1dc8e38d90..58c2666c18e2 100644
--- a/pkgs/development/python-modules/growattserver/default.nix
+++ b/pkgs/development/python-modules/growattserver/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "growattserver";
-  version = "2.0.0";
+  version = "1.9.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "indykoning";
     repo = "PyPi_GrowattServer";
     tag = finalAttrs.version;
-    hash = "sha256-HsBNxE1iHdZbyzGF1rKqiftDXKbOXy8Wf2rQ17kWz6k=";
+    hash = "sha256-CTIc+LROas7RGf9BzGl8hasS512LsNXcDnzLu0DD+Bk=";
   };
 
   build-system = [ setuptools ];