diff --git a/src/urilib.app.src b/src/urilib.app.src
index 59b3bad..5d0bd49 100644
--- a/src/urilib.app.src
+++ b/src/urilib.app.src
@@ -1,6 +1,6 @@
 {application, urilib, [
   {description, "A RFC-3986 URI Library for parsing and building URIs"},
-  {vsn,"0.2.0"},
+  {vsn,"0.3.0"},
   {licenses, ["BSD"]},
   {links, [{"Github", "https://github.com/gmr/urilib"}]},
   {maintainers, ["Gavin M. Roy"]},
diff --git a/src/urilib.erl b/src/urilib.erl
index b579ad9..755cc93 100644
--- a/src/urilib.erl
+++ b/src/urilib.erl
@@ -323,11 +323,11 @@ url_maybe_add_fragment(Value, URL) ->
 hex_to_upper(Value) ->
     hex_to_upper(Value, []).
 hex_to_upper([], Accum) ->
-    Accum;
+    lists:reverse(Accum);
 hex_to_upper([$%, B1, B2|T], Accum) ->
-    hex_to_upper(T, lists:append(Accum, [$%, to_upper(B1), to_upper(B2)]));
+    hex_to_upper(T, [to_upper(B2), to_upper(B1), $% | Accum]);
 hex_to_upper([H|T], Accum) ->
-    hex_to_upper(T, lists:append(Accum, [H])).
+    hex_to_upper(T, [H | Accum]).
 
 
 -spec to_upper(char()) -> char().