diff --git a/pkgs/tools/misc/parallel/default.nix b/pkgs/tools/misc/parallel/default.nix
index 9bb09d227c4..75be4efe7d1 100644
--- a/pkgs/tools/misc/parallel/default.nix
+++ b/pkgs/tools/misc/parallel/default.nix
@@ -1,11 +1,11 @@
 { fetchurl, stdenv, perl, makeWrapper, procps }:
 
 stdenv.mkDerivation rec {
-  name = "parallel-20180422";
+  name = "parallel-20180522";
 
   src = fetchurl {
     url = "mirror://gnu/parallel/${name}.tar.bz2";
-    sha256 = "0xsfpbxwgd4197gra981iv0nmjfk58c0d88dxx6dh6yrqz523klx";
+    sha256 = "1khcz9pm7rjnq4gw8pn30k1d40x337a204dxj4y4qijpx8m7w0gb";
   };
 
   nativeBuildInputs = [ makeWrapper perl ];