gistfile1.diff

diff --git a/lib/Net/Twitter/Core.pm b/lib/Net/Twitter/Core.pm
index f52207c..3011089 100644
--- a/lib/Net/Twitter/Core.pm
+++ b/lib/Net/Twitter/Core.pm
@@ -86,7 +86,7 @@ sub _authenticated_request {
 
     my $msg;
 
-    $_ = encode('utf-8', $_) for values %$args;
+    $_ = encode('utf-8', $_) for keys %$args, values %$args;
 
     if ( $http_method eq 'GET' ) {
         $uri->query_form($args);
diff --git a/lib/Net/Twitter/Role/OAuth.pm b/lib/Net/Twitter/Role/OAuth.pm
index e38f999..3c6249c 100644
--- a/lib/Net/Twitter/Role/OAuth.pm
+++ b/lib/Net/Twitter/Role/OAuth.pm
@@ -181,7 +181,7 @@ override _authenticated_request => sub {
     }
     elsif ( $http_method eq 'POST' ) {
         delete $args->{source}; # not necessary with OAuth requests
-        $_ = encode('utf-8', $_) for values %$args;
+        $_ = encode('utf-8', $_) for keys %$args, values %$args;
         $msg = POST($uri, $args);
     }
     else {