diff --git a/pkgs/development/python-modules/plantuml-markdown/default.nix b/pkgs/development/python-modules/plantuml-markdown/default.nix
index 25b56e2a4254..6da64c191315 100644
--- a/pkgs/development/python-modules/plantuml-markdown/default.nix
+++ b/pkgs/development/python-modules/plantuml-markdown/default.nix
@@ -11,7 +11,7 @@
 }:
 let
   pname = "plantuml-markdown";
-  version = "3.6.3";
+  version = "3.7.3";
 in
 buildPythonPackage {
   inherit pname version;
@@ -20,7 +20,7 @@ buildPythonPackage {
     owner = "mikitex70";
     repo = pname;
     rev = "refs/tags/${version}";
-    sha256 = "sha256-y5Z7mjx2+DW8DwSSyy3tLn11rB7daQyyjsoY/QoI6mc=";
+    sha256 = "sha256-iRIHq4GmYzNq11t61Lz69amOoG54j50Mc32NsaLNHOk=";
   };
 
   propagatedBuildInputs = [