diff --git a/lib/Mojo/Cookie/Response.pm b/lib/Mojo/Cookie/Response.pm
index ea1419c8f6..6465f27b49 100644
--- a/lib/Mojo/Cookie/Response.pm
+++ b/lib/Mojo/Cookie/Response.pm
@@ -4,9 +4,9 @@ use Mojo::Base 'Mojo::Cookie';
 use Mojo::Date;
 use Mojo::Util qw(quote split_cookie_header);
 
-has [qw(domain expires host_only httponly max_age path samesite secure)];
+has [qw(domain expires host_only httponly max_age path samesite secure partitioned)];
 
-my %ATTRS = map { $_ => 1 } qw(domain expires httponly max-age path samesite secure);
+my %ATTRS = map { $_ => 1 } qw(domain expires httponly max-age path samesite secure partitioned);
 
 sub parse {
   my ($self, $str) = @_;
@@ -21,7 +21,7 @@ sub parse {
       next unless $ATTRS{my $attr = lc $name};
       $value =~ s/^\.// if $attr eq 'domain' && defined $value;
       $value = Mojo::Date->new($value // '')->epoch if $attr eq 'expires';
-      $value = 1                                    if $attr eq 'secure' || $attr eq 'httponly';
+      $value = 1 if $attr eq 'secure' || $attr eq 'httponly' || $attr eq 'partitioned';
       $cookies[-1]{$attr eq 'max-age' ? 'max_age' : $attr} = $value;
     }
   }
@@ -53,6 +53,9 @@ sub to_string {
   # "HttpOnly"
   $cookie .= "; HttpOnly" if $self->httponly;
 
+  # "Partitioned"
+  $cookie .= "; Partitioned" if $self->partitioned;
+
   # "Same-Site"
   if (my $samesite = $self->samesite) { $cookie .= "; SameSite=$samesite" }
 
diff --git a/lib/Mojolicious/Sessions.pm b/lib/Mojolicious/Sessions.pm
index 989ad5faaa..77c6af3e67 100644
--- a/lib/Mojolicious/Sessions.pm
+++ b/lib/Mojolicious/Sessions.pm
@@ -11,6 +11,7 @@ has default_expiration => 3600;
 has deserialize        => sub { \&_deserialize };
 has samesite           => 'Lax';
 has serialize          => sub { \&_serialize };
+has partitioned        => 0;
 
 sub load {
   my ($self, $c) = @_;
@@ -51,12 +52,13 @@ sub store {
   my $value = b64_encode $self->serialize->($session), '';
   $value =~ y/=/-/;
   my $options = {
-    domain   => $self->cookie_domain,
-    expires  => $session->{expires},
-    httponly => 1,
-    path     => $self->cookie_path,
-    samesite => $self->samesite,
-    secure   => $self->secure
+    domain      => $self->cookie_domain,
+    expires     => $session->{expires},
+    httponly    => 1,
+    path        => $self->cookie_path,
+    samesite    => $self->samesite,
+    secure      => $self->secure,
+    partitioned => $self->partitioned
   };
   $c->signed_cookie($self->cookie_name, $value, $options);
 }
diff --git a/t/mojo/cookie.t b/t/mojo/cookie.t
index 2a61029d7b..206c1685ed 100644
--- a/t/mojo/cookie.t
+++ b/t/mojo/cookie.t
@@ -173,8 +173,9 @@ subtest 'Full response cookie as string' => sub {
   $cookie->secure(1);
   $cookie->httponly(1);
   $cookie->samesite('Lax');
+  $cookie->partitioned(1);
   is $cookie->to_string, '0="ba r"; expires=Thu, 07 Aug 2008 07:07:59 GMT; domain=example.com;'
-    . ' path=/test; secure; HttpOnly; SameSite=Lax; Max-Age=60', 'right format';
+    . ' path=/test; secure; HttpOnly; Partitioned; SameSite=Lax; Max-Age=60', 'right format';
 };
 
 subtest 'Empty response cookie' => sub {
@@ -216,6 +217,18 @@ subtest 'Parse response cookie (RFC 6265)' => sub {
   is $cookies->[1],          undef,         'no more cookies';
 };
 
+subtest 'Partitioned cookie (RFC 6265 CHIPS)' => sub {
+  my $cookies
+    = Mojo::Cookie::Response->parse(
+    'foo="bar"; Domain=example.com; Path=/test; Max-Age=60; Partitioned; Expires=Thu, 07 Aug 2008 07:07:59 GMT; Secure;'
+    );
+  is $cookies->[0]->partitioned, 1, 'partitioned set?';
+
+  $cookies = Mojo::Cookie::Response->parse(
+    'foo="bar"; Domain=example.com; Path=/test; Max-Age=60; Expires=Thu, 07 Aug 2008 07:07:59 GMT; Secure;');
+  is $cookies->[0]->partitioned, undef, 'partitioned not set?';
+};
+
 subtest 'Parse response cookie with invalid flag (RFC 6265)' => sub {
   my $cookies = Mojo::Cookie::Response->parse(
     'foo="ba r"; Domain=.example.com; Path=/test; Max-Age=60;' . ' Expires=Thu, 07 Aug 2008 07:07:59 GMT; InSecure;');