diff --git a/pkgs/development/python-modules/opower/default.nix b/pkgs/development/python-modules/opower/default.nix
index 0d25314befdf..4a0eb17999e3 100644
--- a/pkgs/development/python-modules/opower/default.nix
+++ b/pkgs/development/python-modules/opower/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "opower";
-  version = "0.4.1";
+  version = "0.4.2";
   pyproject = true;
 
   disabled = pythonOlder "3.9";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "tronikos";
     repo = "opower";
     rev = "refs/tags/v${version}";
-    hash = "sha256-PB6t1ltxJs7aYn/OthCORHbyRXqMkTZ6YE2He0k/2mc=";
+    hash = "sha256-mQE3WypB//OPilx4vA8b8V+eO0MJ/cSa3wILLW+Jk4Y=";
   };
 
   nativeBuildInputs = [