diff --git a/pkgs/tools/misc/mbuffer/default.nix b/pkgs/tools/misc/mbuffer/default.nix
index 67640cf30abe..e39a514bcb8c 100644
--- a/pkgs/tools/misc/mbuffer/default.nix
+++ b/pkgs/tools/misc/mbuffer/default.nix
@@ -3,12 +3,12 @@
  } :
 
 stdenv.mkDerivation rec {
-  version = "20181119";
+  version = "20190113";
   name = "mbuffer-${version}";
 
   src = fetchurl {
     url = "http://www.maier-komor.de/software/mbuffer/mbuffer-${version}.tgz";
-    sha256 = "1pysnvq03g3w4npw15cykgd0n7nj7lmv655szav4802pz1dgywj7";
+    sha256 = "07rgv98ys3bd0q35ivxjrgrhq199z19lj14jafzq96gcwspy8783";
   };
 
   buildInputs = [ openssl ];