diff --git a/pkgs/data/misc/tzdata/default.nix b/pkgs/data/misc/tzdata/default.nix
index 8789316ccdc4..045a9eef00a6 100644
--- a/pkgs/data/misc/tzdata/default.nix
+++ b/pkgs/data/misc/tzdata/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl }:
 
-let version = "2015f"; in
+let version = "2015g"; in
 
 stdenv.mkDerivation rec {
   name = "tzdata-${version}";
@@ -8,11 +8,11 @@ stdenv.mkDerivation rec {
   srcs =
     [ (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzdata${version}.tar.gz";
-        sha256 = "07ak8ai5skgjpj6lg74pawxg0bz998k7s2ah7jqyqhp086sq37wm";
+        sha256 = "0qb1awqrn3215zd2jikpqnmkzrxwfjf0d3dw2xmnk4c40yzws8xr";
       })
       (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzcode${version}.tar.gz";
-        sha256 = "1bl4vqw6yp9199clm9aai566bmslp42g5xglj3vl24dn5fjf158c";
+        sha256 = "1i3y1kzjiz2j62c7vd4wf85983sqk9x9lg3473njvbdz4kph5r0q";
       })
     ];