diff --git a/pkgs/tools/misc/plantuml/default.nix b/pkgs/tools/misc/plantuml/default.nix
index 0f035c347cf..c3d3f916d97 100644
--- a/pkgs/tools/misc/plantuml/default.nix
+++ b/pkgs/tools/misc/plantuml/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, makeWrapper, jre, graphviz }:
 
 stdenv.mkDerivation rec {
-  version = "1.2018.12";
+  version = "1.2018.13";
   name = "plantuml-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/project/plantuml/${version}/plantuml.${version}.jar";
-    sha256 = "1ydi4zwzwf9q6hldzd9pcvsbrwy8r52vqxm74j2wq8yivh2p85s4";
+    sha256 = "181wm05gp4hs4g0z345pp1x9w1g5bx1vpipkhnwvmy4vdj17b4bg";
   };
 
   nativeBuildInputs = [ makeWrapper ];