diff --git a/inttest/appup_src/appup_src_rt.erl b/inttest/appup_src/appup_src_rt.erl
index 43d3c5d..2ca6788 100644
--- a/inttest/appup_src/appup_src_rt.erl
+++ b/inttest/appup_src/appup_src_rt.erl
@@ -47,11 +47,11 @@ run(Dir) ->
     retest_log:log(debug, "Generated ebin/app.appup~n", []),
 
     %% check that ebin/app.appup has expected version
-    {ok, [{AppVersion, [{UpgradeFrom, _}], [{DowngradeTo, _}]}]} =
+    {ok, [{AppVersion, [{UpgradeFrom, _} |  _UpgradeFromRest], [{DowngradeTo, _} | _DowngradeToRest]}]} =
         file:consult("ebin/app.appup"),
-    ?assertEqual(AppVersion, "1.2.2"),
-    ?assertEqual(UpgradeFrom, "1.2.1"),
-    ?assertEqual(DowngradeTo, "1.2.1"),
+    ?assertEqual(AppVersion, "%VSN%"),
+    ?assertEqual(UpgradeFrom, "1.3"),
+    ?assertEqual(DowngradeTo, "1.3"),
     ok.
 
 has_line([], _RE) ->
diff --git a/inttest/appup_src/src/app.appup.src b/inttest/appup_src/src/app.appup.src
index 1ca946a..a094f59 100644
--- a/inttest/appup_src/src/app.appup.src
+++ b/inttest/appup_src/src/app.appup.src
@@ -1,6 +1,162 @@
-{"1.2.2",
-	[{"1.2.1",
-		[{update,proc1,{advanced,[]},[]},
-         {update,proc2,{advanced,[]},[]}]
-     }],
-     [{"1.2.1", []}]}.
+{"%VSN%",
+ [
+  {"1.3",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_per_bin},
+     {add_module, asn1rt_check},
+     {add_module, asn1rt_per_bin_rt2ct},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_per_bin},
+     {add_module, asn1rt_check},
+     {add_module, asn1rt_per_bin_rt2ct},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.1.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_per_bin},
+     {add_module, asn1rt_check},
+     {add_module, asn1rt_per_bin_rt2ct},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.2",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {add_module, asn1rt_per_bin_rt2ct},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.3",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin_rt2ct, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.3.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin_rt2ct, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_bin_v2},
+     {add_module, asn1rt_driver_handler},
+     {remove, {asn1rt_ber_v1, soft_purge, soft_purge}}
+   ]
+  }
+ ],
+ [
+  {"1.3",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_per_bin, soft_purge, soft_purge}},
+     {remove, {asn1rt_check, soft_purge, soft_purge}},
+     {remove, {asn1rt_per_bin_rt2ct, soft_purge, soft_purge}},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_per_bin, soft_purge, soft_purge}},
+     {remove, {asn1rt_check, soft_purge, soft_purge}},
+     {remove, {asn1rt_per_bin_rt2ct, soft_purge, soft_purge}},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.1.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_per_bin, soft_purge, soft_purge}},
+     {remove, {asn1rt_check, soft_purge, soft_purge}},
+     {remove, {asn1rt_per_bin_rt2ct, soft_purge, soft_purge}},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.2",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_per_bin_rt2ct, soft_purge, soft_purge}},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.3",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin_rt2ct, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  },
+  {"1.3.3.1",
+   [
+     {load_module, asn1rt_per_v1, soft_purge, soft_purge, []},
+     {load_module, asn1rt_ber_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin, soft_purge, soft_purge, []},
+     {load_module, asn1rt_check, soft_purge, soft_purge, []},
+     {load_module, asn1rt_per_bin_rt2ct, soft_purge, soft_purge, []},
+     {add_module, asn1rt_ber_v1},
+     {remove, {asn1rt_ber_bin_v2, soft_purge, soft_purge}},
+     {remove, {asn1rt_driver_handler, soft_purge, soft_purge}}
+   ]
+  }
+
+ ]}.
diff --git a/inttest/appup_src_2/appup_src_2_rt.erl b/inttest/appup_src_2/appup_src_2_rt.erl
new file mode 100644
index 0000000..09d2503
--- /dev/null
+++ b/inttest/appup_src_2/appup_src_2_rt.erl
@@ -0,0 +1,65 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+%% -------------------------------------------------------------------
+%%
+%% rebar: Erlang Build Tools
+%%
+%% Copyright (c) 2015 Luis Rascao (luis.rascao@gmail.com)
+%%
+%% Permission is hereby granted, free of charge, to any person obtaining a copy
+%% of this software and associated documentation files (the "Software"), to deal
+%% in the Software without restriction, including without limitation the rights
+%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+%% copies of the Software, and to permit persons to whom the Software is
+%% furnished to do so, subject to the following conditions:
+%%
+%% The above copyright notice and this permission notice shall be included in
+%% all copies or substantial portions of the Software.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+%% THE SOFTWARE.
+%% -------------------------------------------------------------------
+-module(appup_src_2_rt).
+
+-compile(export_all).
+
+-include_lib("eunit/include/eunit.hrl").
+
+files() ->
+    [{copy, "../../rebar", "rebar"},
+     {copy, "src", "src"}].
+
+run(Dir) ->
+    retest_log:log(debug, "Running in Dir: ~s~n", [Dir]),
+    {ok, [_Pid|Output]} = retest:sh("./rebar compile -vv",
+                                    [{async, false}]),
+
+    LineRegexp = "Compiled src/app\.appup\.src",
+    ?assertEqual(true, has_line(Output, LineRegexp)),
+
+    %% check that ebin/app.appup exists
+    ?assertMatch(true, filelib:is_regular("ebin/app.appup")),
+    retest_log:log(debug, "Generated ebin/app.appup~n", []),
+
+    %% check that ebin/app.appup has expected version
+    {ok, [{AppVersion, [], []}]} =
+        file:consult("ebin/app.appup"),
+    ?assertEqual(AppVersion, "1.24"),
+    ok.
+
+has_line([], _RE) ->
+    false;
+has_line([L|T], RE) ->
+    case re:run(L, RE, []) of
+        {match, _Captured} ->
+            true;
+        match ->
+            true;
+        nomatch ->
+            has_line(T, RE)
+    end.
diff --git a/inttest/appup_src_2/appup_src_rt_2.erl b/inttest/appup_src_2/appup_src_rt_2.erl
new file mode 100644
index 0000000..d662183
--- /dev/null
+++ b/inttest/appup_src_2/appup_src_rt_2.erl
@@ -0,0 +1,67 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+%% -------------------------------------------------------------------
+%%
+%% rebar: Erlang Build Tools
+%%
+%% Copyright (c) 2015 Luis Rascao (luis.rascao@gmail.com)
+%%
+%% Permission is hereby granted, free of charge, to any person obtaining a copy
+%% of this software and associated documentation files (the "Software"), to deal
+%% in the Software without restriction, including without limitation the rights
+%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+%% copies of the Software, and to permit persons to whom the Software is
+%% furnished to do so, subject to the following conditions:
+%%
+%% The above copyright notice and this permission notice shall be included in
+%% all copies or substantial portions of the Software.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+%% THE SOFTWARE.
+%% -------------------------------------------------------------------
+-module(appup_src_rt_2).
+
+-compile(export_all).
+
+-include_lib("eunit/include/eunit.hrl").
+
+files() ->
+    [{copy, "../../rebar", "rebar"},
+     {copy, "src", "src"}].
+
+run(Dir) ->
+    retest_log:log(debug, "Running in Dir: ~s~n", [Dir]),
+    {ok, [_Pid|Output]} = retest:sh("./rebar compile -vv",
+                                    [{async, false}]),
+
+    LineRegexp = "Compiled src/app\.appup\.src",
+    ?assertEqual(true, has_line(Output, LineRegexp)),
+
+    %% check that ebin/app.appup exists
+    ?assertMatch(true, filelib:is_regular("ebin/app.appup")),
+    retest_log:log(debug, "Generated ebin/app.appup~n", []),
+
+    %% check that ebin/app.appup has expected version
+    {ok, [{AppVersion, [{UpgradeFrom, _}], [{DowngradeTo, _}]}]} =
+        file:consult("ebin/app.appup"),
+    ?assertEqual(AppVersion, "1.2.2"),
+    ?assertEqual(UpgradeFrom, "1.2.1"),
+    ?assertEqual(DowngradeTo, "1.2.1"),
+    ok.
+
+has_line([], _RE) ->
+    false;
+has_line([L|T], RE) ->
+    case re:run(L, RE, []) of
+        {match, _Captured} ->
+            true;
+        match ->
+            true;
+        nomatch ->
+            has_line(T, RE)
+    end.
diff --git a/inttest/appup_src_2/src/app.app.src b/inttest/appup_src_2/src/app.app.src
new file mode 100644
index 0000000..9a63bb3
--- /dev/null
+++ b/inttest/appup_src_2/src/app.app.src
@@ -0,0 +1,5 @@
+{application, app,
+	[{vsn, "1"},
+     {modules, []},
+     {registered, []},
+     {applications, [kernel, stdlib]}]}.
diff --git a/inttest/appup_src_2/src/app.appup.src b/inttest/appup_src_2/src/app.appup.src
new file mode 100644
index 0000000..ca647e5
--- /dev/null
+++ b/inttest/appup_src_2/src/app.appup.src
@@ -0,0 +1,4 @@
+{"1.24",
+ [],
+ []
+}.
diff --git a/inttest/appup_src_2/src/appup_src.erl b/inttest/appup_src_2/src/appup_src.erl
new file mode 100644
index 0000000..6f4d0d7
--- /dev/null
+++ b/inttest/appup_src_2/src/appup_src.erl
@@ -0,0 +1,6 @@
+-module(appup_src).
+
+-compile(export_all).
+
+test() ->
+    ok.
diff --git a/src/rebar_otp_appup.erl b/src/rebar_otp_appup.erl
index a97044f..36fd353 100644
--- a/src/rebar_otp_appup.erl
+++ b/src/rebar_otp_appup.erl
@@ -73,7 +73,8 @@ preprocess(SourceFile, TargetFile, _Config) ->
     case rebar_config:consult_file(SourceFile) of
         %% The .appup syntax is described in
         %% http://erlang.org/doc/man/appup.html.
-        {ok, [{_Vsn, [_UpFromVsn], [_DownToVsn]} = AppUp]} ->
+        {ok, [{_Vsn, UpFromVsn, DownToVsn} = AppUp]}
+          when is_list(UpFromVsn), is_list(DownToVsn) ->
             case file:write_file(TargetFile,
                                  lists:flatten(io_lib:format("~p.", [AppUp]))) of
                 {error, Reason} ->