diff --git a/pkgs/development/python-modules/openpyxl/default.nix b/pkgs/development/python-modules/openpyxl/default.nix
index d858d8ad4281..72205f8727fe 100644
--- a/pkgs/development/python-modules/openpyxl/default.nix
+++ b/pkgs/development/python-modules/openpyxl/default.nix
@@ -10,12 +10,12 @@
 
 buildPythonPackage rec {
   pname = "openpyxl";
-  version = "3.0.3";
+  version = "3.0.4";
   disabled = isPy27; # 2.6.4 was final python2 release
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "547a9fc6aafcf44abe358b89ed4438d077e9d92e4f182c87e2dc294186dc4b64";
+    sha256 = "d88dd1480668019684c66cfff3e52a5de4ed41e9df5dd52e008cbf27af0dbf87";
   };
 
   checkInputs = [ pytest ];