diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 01644080b40c..b5aa0933c2e8 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -21,7 +21,7 @@
 , libiconv, postgresql, v8_3_16_14, clang, sqlite, zlib, imagemagick
 , pkgconfig , ncurses, xapian_1_2_22, gpgme, utillinux, fetchpatch, tzdata, icu, libffi
 , cmake, libssh2, openssl, mysql, darwin, git, perl, pcre, gecode_3, curl
-, msgpack, qt48, libsodium, snappy, libossp_uuid, lxc, libpcap, xorg, gtk2, buildRubyGem
+, msgpack, qt59, libsodium, snappy, libossp_uuid, lxc, libpcap, xorg, gtk2, buildRubyGem
 , cairo, re2, rake, gobjectIntrospection, gdk_pixbuf, zeromq, graphicsmagick, libcxx, file
 }@args:
 
@@ -69,7 +69,7 @@ in
   };
 
   capybara-webkit = attrs: {
-    buildInputs = [ qt48 ] ++ stdenv.lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
+    buildInputs = [ qt59.qtbase qt59.qtwebkit ] ++ stdenv.lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
     NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
   };