diff --git a/pkgs/tools/networking/tinc/default.nix b/pkgs/tools/networking/tinc/default.nix
index bcfb584da1b7..dd6bfb82aab0 100644
--- a/pkgs/tools/networking/tinc/default.nix
+++ b/pkgs/tools/networking/tinc/default.nix
@@ -1,12 +1,12 @@
 {stdenv, fetchurl, lzo, openssl, zlib}:
 
 stdenv.mkDerivation rec {
-  version = "1.0.19";
+  version = "1.0.21";
   name = "tinc-${version}";
 
   src = fetchurl {
     url = "http://www.tinc-vpn.org/packages/tinc-${version}.tar.gz";
-    sha256 = "183nxj23d05vc3pxwbb692lr048wr81wnv0avzlkdm4r6c3bp7jh";
+    sha256 = "12v1x9p4f8y9967ypwxhkr10q6pk4cdallr0k4lic0kcfsmmxhba";
   };
 
   buildInputs = [ lzo openssl zlib ];