diff --git a/pkgs/tools/security/tor/torbrowser.nix b/pkgs/tools/security/tor/torbrowser.nix
index bd7531af18f..6e8f638c8b0 100644
--- a/pkgs/tools/security/tor/torbrowser.nix
+++ b/pkgs/tools/security/tor/torbrowser.nix
@@ -2,9 +2,6 @@
 , xorg, alsaLib, dbus, dbus_glib, glib, gtk, atk, pango, freetype, fontconfig
 , gdk_pixbuf, cairo, zlib}:
 let
-  bits = if stdenv.system == "x86_64-linux" then "64"
-         else "32";
-
   # isolated tor environment
   torEnv = buildEnv {
     name = "tor-env";
@@ -15,18 +12,17 @@ let
     ];
   };
 
-  ldLibraryPath = if bits == "64" then torEnv+"/lib:"+torEnv+"/lib64"
-        else torEnv+"/lib";
+  ldLibraryPath = ''${torEnv}/lib${stdenv.lib.optionalString stdenv.is64bit ":${torEnv}/lib64"}'';
 
 in stdenv.mkDerivation rec {
   name = "tor-browser-${version}";
-  version = "4.5.3";
+  version = "5.0.3";
 
   src = fetchurl {
-    url = "https://archive.torproject.org/tor-package-archive/torbrowser/${version}/tor-browser-linux${bits}-${version}_en-US.tar.xz";
-    sha256 = if bits == "64" then
-      "24c517d2aeb15ba5eeda1eb87f483ed4fb0c22b07a95ca26af9f692e0d4d9b7c" else
-      "154d659583048e91870c40921561f0519babf6d3c9ac439f6fb74ed66824463f";
+    url = "https://archive.torproject.org/tor-package-archive/torbrowser/${version}/tor-browser-linux${if stdenv.is64bit then "64" else "32"}-${version}_en-US.tar.xz";
+    sha256 = if stdenv.is64bit then
+      "1lqsiidnlrh0dlwzc93d0vbjclkb1zq3mwfcjxadjpwik6afszsb" else
+      "1ajn1bw1j63h3yblh06mmp7xhwdhqg9pdkxyz1dqj1rsp264k50f";
   };
 
   patchPhase = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e5fa4d3616a..07afaa6587b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3172,7 +3172,9 @@ let
 
   torbutton = callPackage ../tools/security/torbutton { };
 
-  torbrowser = callPackage ../tools/security/tor/torbrowser.nix { };
+  torbrowser = callPackage ../tools/security/tor/torbrowser.nix {
+    stdenv = overrideCC stdenv gcc5;
+  };
 
   touchegg = callPackage ../tools/inputmethods/touchegg { };