diff --git a/go.mod b/go.mod
index e589003..15a5466 100644
--- a/go.mod
+++ b/go.mod
@@ -1,12 +1,12 @@
-module github.com/y-a-t-s/libkiwi
+module gitgud.io/yats/libkiwi
 
 go 1.25.6
 
-require github.com/y-a-t-s/firebird v0.0.0-20251115152558-29bf6ad7c90b
+require github.com/y-a-t-s/cerberus v0.0.0-20260209172955-b5a3082a97ee
 
 require (
 	github.com/klauspost/cpuid/v2 v2.2.3 // indirect
 	github.com/minio/sha256-simd v1.0.1 // indirect
-	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
 )
diff --git a/go.sum b/go.sum
index b234a28..b8c5024 100644
--- a/go.sum
+++ b/go.sum
@@ -2,10 +2,12 @@ github.com/klauspost/cpuid/v2 v2.2.3 h1:sxCkb+qR91z4vsqw4vGGZlDgPz3G7gjaLyK3V8y7
 github.com/klauspost/cpuid/v2 v2.2.3/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
 github.com/minio/sha256-simd v1.0.1 h1:6kaan5IFmwTNynnKKpDHe6FWHohJOHhCPchzK49dzMM=
 github.com/minio/sha256-simd v1.0.1/go.mod h1:Pz6AKMiUdngCLpeTL/RJY1M9rUuPMYujV5xJjtbRSN8=
-github.com/y-a-t-s/firebird v0.0.0-20251115152558-29bf6ad7c90b h1:tAqjNda25c1SpnoDmDx5b1KIuN0VTgskoU4shwSMdFI=
-github.com/y-a-t-s/firebird v0.0.0-20251115152558-29bf6ad7c90b/go.mod h1:/qomDTP1XQRFc0TLzcf0Y5wMHftgl5z40PAb9aTxXGg=
-golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
-golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
+github.com/y-a-t-s/cerberus v0.0.0-20260204195623-34ceeced8f89 h1:mlG5ck3Of8vNKPZX/RXs7T+kJPcsLsK8hcG0kAQScc0=
+github.com/y-a-t-s/cerberus v0.0.0-20260204195623-34ceeced8f89/go.mod h1:CO0/MIkpLBFxuhP1+j7u+IN4JRBSIzk8MNnSIGsmenI=
+github.com/y-a-t-s/cerberus v0.0.0-20260209172955-b5a3082a97ee h1:DWnyTaXLd4F3Digp8NVD4v/IOH13VwLc07Jh5eeKxfM=
+github.com/y-a-t-s/cerberus v0.0.0-20260209172955-b5a3082a97ee/go.mod h1:CO0/MIkpLBFxuhP1+j7u+IN4JRBSIzk8MNnSIGsmenI=
+golang.org/x/net v0.49.0 h1:eeHFmOGUTtaaPSGNmjBKpbng9MulQsJURQUAfUwY++o=
+golang.org/x/net v0.49.0/go.mod h1:/ysNB2EvaqvesRkuLAyjI1ycPZlQHM3q01F02UY/MV8=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
-golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
+golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
diff --git a/libkiwi.go b/libkiwi.go
index eb83750..06d76c5 100644
--- a/libkiwi.go
+++ b/libkiwi.go
@@ -3,13 +3,14 @@ package libkiwi
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net/http"
 	"net/http/cookiejar"
 	"net/url"
 	"regexp"
 	"strings"
 
-	"github.com/y-a-t-s/firebird"
+	"github.com/y-a-t-s/cerberus"
 )
 
 type KF struct {
@@ -18,28 +19,27 @@ type KF struct {
 }
 
 // Supply your own http.Client to route through any proxies.
-func NewKF(hc http.Client, host string, cookies string) (kf *KF, err error) {
+func NewKF(hc http.Client, host string, cookies string) (KF, error) {
 	u, err := parseHost(host)
 	if err != nil {
-		return
+		return KF{}, err
 	}
 
-	jar, err := cookiejar.New(nil)
-	if err != nil {
-		return nil, err
+	if hc.Jar == nil {
+		jar, err := cookiejar.New(nil)
+		if err != nil {
+			return KF{}, err
+		}
+		hc.Jar = jar
 	}
 
-	cs, err := parseCookieString(u, cookies)
-	if err != nil {
-		return nil, err
-	}
+	if cookies != "" {
+		cs, err := parseCookieString(u, cookies)
+		if err != nil {
+			return KF{}, err
+		}
 
-	jar.SetCookies(u, cs)
-	hc.Jar = jar
-
-	kf = &KF{
-		Client: hc,
-		domain: u,
+		hc.Jar.SetCookies(u, cs)
 	}
 
 	// Update host url in case we get redirected across domains.
@@ -54,7 +54,10 @@ func NewKF(hc http.Client, host string, cookies string) (kf *KF, err error) {
 		return nil
 	}
 
-	return
+	return KF{
+		Client: hc,
+		domain: u,
+	}, nil
 }
 
 func (kf *KF) GetPage(ctx context.Context, u *url.URL) (*http.Response, error) {
@@ -76,7 +79,7 @@ func (kf *KF) GetPage(ctx context.Context, u *url.URL) (*http.Response, error) {
 
 	// KiwiFlare redirect is signaled by 203 status.
 	if resp.StatusCode == 203 {
-		err = kf.solveKiwiFlare(ctx)
+		err = kf.SolveKiwiFlare(ctx)
 		if err != nil {
 			return nil, err
 		}
@@ -109,22 +112,29 @@ func parseCookieString(u *url.URL, cookies string) ([]*http.Cookie, error) {
 
 func setCookie(jar http.CookieJar, u *url.URL, cookie *http.Cookie) {
 	cookies := jar.Cookies(u)
-	found := false
+
 	for i, c := range cookies {
 		if c.Name == cookie.Name {
 			cookies[i] = cookie
-			found = true
-			break
+			// Store changes and stop looping since it's found.
+			jar.SetCookies(u, cookies)
+			return
 		}
 	}
 
-	if !found {
-		cookies = append(cookies, cookie)
-	}
-
+	// Append new cookie if existing one not found.
+	cookies = append(cookies, cookie)
 	jar.SetCookies(u, cookies)
 }
 
+func (kf *KF) CookieString() string {
+	var b strings.Builder
+	for _, c := range kf.Client.Jar.Cookies(kf.domain) {
+		fmt.Fprintf(&b, "%s: %s; ", c.Name, c.Value)
+	}
+	return strings.TrimSuffix(b.String(), "; ")
+}
+
 func (kf *KF) RefreshSession(ctx context.Context) (string, error) {
 	// Clear any existing session token to request a new one.
 	setCookie(kf.Client.Jar, kf.domain, &http.Cookie{
@@ -141,19 +151,20 @@ func (kf *KF) RefreshSession(ctx context.Context) (string, error) {
 	return regexp.MustCompile(`xf_session=([^;]*)`).FindString(resp.Header.Get("Set-Cookie")), nil
 }
 
-func (kf *KF) solveKiwiFlare(ctx context.Context) error {
-	c, err := firebird.NewChallenge(kf.Client, kf.domain.String())
+func (kf *KF) SolveKiwiFlare(ctx context.Context) error {
+	c, err := cerberus.NewChallenge(ctx, kf.Client, kf.domain.String())
 	if err != nil {
 		return err
 	}
-	s, err := firebird.Solve(ctx, c)
+	s, err := cerberus.Solve(ctx, c)
 	if err != nil {
 		return err
 	}
-	_, err = firebird.Submit(kf.Client, s)
+	resp, err := cerberus.Submit(ctx, kf.Client, s, "")
 	if err != nil {
 		return err
 	}
+	defer resp.Body.Close()
 
 	return nil
 }
diff --git a/libkiwi_test.go b/libkiwi_test.go
index 8d951d4..c66131c 100644
--- a/libkiwi_test.go
+++ b/libkiwi_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 )
 
-const TEST_HOST = "kiwifarms.net"
+const TEST_HOST = "kiwifarms.st"
 
 func TestGetPage(t *testing.T) {
 	cookies := os.Getenv("TEST_COOKIES")