diff --git a/pkgs/tools/text/wdiff/default.nix b/pkgs/tools/text/wdiff/default.nix
index 7ae7241c40b..760ab077012 100644
--- a/pkgs/tools/text/wdiff/default.nix
+++ b/pkgs/tools/text/wdiff/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "wdiff-0.6.1";
+  name = "wdiff-0.6.3";
 
   src = fetchurl {
     url = "mirror://gnu/wdiff/${name}.tar.gz";
-    sha256 = "0cgmx9k8sj0l79kp4m2lmn4ifx55ah68q4qk7xsanx69m1061ghf";
+    sha256 = "04x0snfyahw9si160zwghh5nmijn535iacbbfsd376w4p0k5zk08";
   };
 
   doCheck = true;