diff --git a/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix b/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
index fd59b173a732..5a1510eaa8c5 100644
--- a/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
+++ b/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
@@ -3,9 +3,9 @@
 mkXfceDerivation {
   category = "apps";
   pname = "xfce4-taskmanager";
-  version = "1.2.3";
+  version = "1.4.2";
 
-  sha256 = "0818chns7vkvjqakgz8z790adkygcq4jlw59dv6kyzk17hxq6cxv";
+  sha256 = "1l7k00y3d9j38g4hxjrcrh1y4s6s77sq4sjcadsbpzs6zdf05hld";
 
   nativeBuildInputs = [ exo ];
   buildInputs = [ gtk3 libwnck3 libXmu ];