diff --git a/pkgs/tools/backup/duplicity/default.nix b/pkgs/tools/backup/duplicity/default.nix
index 0b0c1dbb9438..5805e29e3954 100644
--- a/pkgs/tools/backup/duplicity/default.nix
+++ b/pkgs/tools/backup/duplicity/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl, python, librsync, gnupg, boto, makeWrapper }:
 
 stdenv.mkDerivation {
-  name = "duplicity-0.6.20";
+  name = "duplicity-0.6.21";
 
   src = fetchurl {
-    url = "http://code.launchpad.net/duplicity/0.6-series/0.6.20/+download/duplicity-0.6.20.tar.gz";
-    sha256 = "0r0nf7arc3n5ipvvbh7h6ksqzbl236iv5pjpmd5s7lff3xswdl2i";
+    url = "http://code.launchpad.net/duplicity/0.6-series/0.6.21/+download/duplicity-0.6.21.tar.gz";
+    sha256 = "01ppxzghnig7al9cwi8ap95y0d3j5n0vf3ag06iw3ysiq6k8lqm3";
   };
 
   installPhase = ''