diff --git a/pkgs/development/python-modules/pysunspec2/default.nix b/pkgs/development/python-modules/pysunspec2/default.nix
index dc9e1ae24419..460ca4ea3f97 100644
--- a/pkgs/development/python-modules/pysunspec2/default.nix
+++ b/pkgs/development/python-modules/pysunspec2/default.nix
@@ -10,14 +10,14 @@
 
 buildPythonPackage rec {
   pname = "pysunspec2";
-  version = "1.3.3";
+  version = "1.3.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "sunspec";
     repo = "pysunspec2";
     tag = "v${version}";
-    hash = "sha256-mVx8Rt5GLyQ2ss0iJPi32Fhl9pD7hsXxW94p+8ri+w4=";
+    hash = "sha256-5iexVb6qXHmVczLydjXu+blGm9zwKGqUBLDUwl8HBrs=";
     fetchSubmodules = true;
   };