diff --git a/pkgs/desktops/gnome-3/3.12/core/evolution-data-server/default.nix b/pkgs/desktops/gnome-3/3.12/core/evolution-data-server/default.nix
index 685f8c24e7cf..d7f65ca6741a 100644
--- a/pkgs/desktops/gnome-3/3.12/core/evolution-data-server/default.nix
+++ b/pkgs/desktops/gnome-3/3.12/core/evolution-data-server/default.nix
@@ -1,18 +1,19 @@
-{ fetchurl, stdenv, pkgconfig, gnome3, python, intltool, libsoup, libxml2, libsecret
+{ fetchurl, stdenv, pkgconfig, gnome3, python
+, intltool, libsoup, libxml2, libsecret, icu
 , p11_kit, db, nspr, nss, libical, gperf, makeWrapper, valaSupport ? true, vala }:
 
 
 stdenv.mkDerivation rec {
-  name = "evolution-data-server-3.10.4";
+  name = "evolution-data-server-3.12.2";
 
   src = fetchurl {
-    url = "mirror://gnome/sources/evolution-data-server/3.10/${name}.tar.xz";
-    sha256 = "5c2d5e19af19ecfa81f31306411ab6155c3c62cf407d5a5aaa675a8ce940fa2d";
+    url = "mirror://gnome/sources/evolution-data-server/3.12/${name}.tar.xz";
+    sha256 = "91c95e17a8c1cd1086dafcd99a40bdf8f5993770f251f8b0a10e5395e3f5a3b6";
   };
 
   buildInputs = with gnome3;
     [ pkgconfig glib python intltool libsoup libxml2 gtk gnome_online_accounts libsecret
-      gcr p11_kit db nspr nss libgweather libical libgdata gperf makeWrapper ]
+      gcr p11_kit db nspr nss libgweather libical libgdata gperf makeWrapper icu ]
     ++ stdenv.lib.optional valaSupport vala;
 
   # uoa irrelevant for now