diff --git a/auth/auth.go b/auth/auth.go
index 8ff5d7d..ebe5738 100644
--- a/auth/auth.go
+++ b/auth/auth.go
@@ -2,7 +2,6 @@
 package auth
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -14,13 +13,6 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
-const (
-	// TokenCookieKey is the key of the cookie stored in the context.
-	TokenCookieKey = "session_token"
-)
-
-type claimsContextKey struct{}
-
 // Auth is a service that provides HTTP handlers and middlewares used for authentication.
 type Auth struct {
 	JWTSecret jwt.Secret
@@ -123,7 +115,7 @@ func (a *Auth) CallBack() http.HandlerFunc {
 		}
 
 		cookie := &http.Cookie{
-			Name:     TokenCookieKey,
+			Name:     jwt.TokenCookieKey,
 			Value:    token,
 			Path:     "/",
 			Expires:  time.Now().Add(jwt.ExpiresDuration),
@@ -135,48 +127,16 @@ func (a *Auth) CallBack() http.HandlerFunc {
 }
 
 // Logout removes session cookies and redirect to home.
-func (a *Auth) Logout() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		cookie, err := r.Cookie(TokenCookieKey)
-		if err != nil {
-			// Ignore error. Cookie doesn't exists.
-			http.Redirect(w, r, "/", http.StatusSeeOther)
-			return
-		}
-		cookie.Value = ""
-		cookie.Path = "/"
-		cookie.Expires = time.Now().Add(-1 * time.Hour)
-		http.SetCookie(w, cookie)
+func Logout(w http.ResponseWriter, r *http.Request) {
+	cookie, err := r.Cookie(jwt.TokenCookieKey)
+	if err != nil {
+		// Ignore error. Cookie doesn't exists.
 		http.Redirect(w, r, "/", http.StatusSeeOther)
+		return
 	}
-}
-
-// Middleware is an authentication guard for HTTP servers.
-func (a *Auth) Middleware(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// Get the JWT token from the request header
-		cookie, err := r.Cookie(TokenCookieKey)
-		if err != nil {
-			next.ServeHTTP(w, r)
-			return
-		}
-
-		// Verify the JWT token
-		claims, err := a.JWTSecret.VerifyToken(cookie.Value)
-		if err != nil {
-			log.Error().Err(err).Msg("token verification failed")
-			next.ServeHTTP(w, r)
-			return
-		}
-
-		// Store the claims in the request context for further use
-		ctx := context.WithValue(r.Context(), claimsContextKey{}, *claims)
-		next.ServeHTTP(w, r.WithContext(ctx))
-	})
-}
-
-// GetClaimsFromRequest is a helper function to fetch the JWT session token from an HTTP request.
-func GetClaimsFromRequest(r *http.Request) (claims jwt.Claims, ok bool) {
-	claims, ok = r.Context().Value(claimsContextKey{}).(jwt.Claims)
-	return claims, ok
+	cookie.Value = ""
+	cookie.Path = "/"
+	cookie.Expires = time.Now().Add(-1 * time.Hour)
+	http.SetCookie(w, cookie)
+	http.Redirect(w, r, "/", http.StatusSeeOther)
 }
diff --git a/auth/webauthn/webauthn.go b/auth/webauthn/webauthn.go
index 307eeca..d4e9c16 100644
--- a/auth/webauthn/webauthn.go
+++ b/auth/webauthn/webauthn.go
@@ -7,7 +7,6 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/Darkness4/auth-htmx/auth"
 	"github.com/Darkness4/auth-htmx/auth/webauthn/session"
 	"github.com/Darkness4/auth-htmx/database/user"
 	"github.com/Darkness4/auth-htmx/jwt"
@@ -162,7 +161,7 @@ func (s *Service) FinishLogin() http.HandlerFunc {
 		}
 
 		cookie := &http.Cookie{
-			Name:     auth.TokenCookieKey,
+			Name:     jwt.TokenCookieKey,
 			Value:    token,
 			Path:     "/",
 			Expires:  time.Now().Add(jwt.ExpiresDuration),
@@ -290,7 +289,7 @@ func (s *Service) FinishRegistration() http.HandlerFunc {
 		}
 
 		cookie := &http.Cookie{
-			Name:     auth.TokenCookieKey,
+			Name:     jwt.TokenCookieKey,
 			Value:    token,
 			Path:     "/",
 			Expires:  time.Now().Add(jwt.ExpiresDuration),
@@ -309,7 +308,7 @@ func (s *Service) FinishRegistration() http.HandlerFunc {
 // Compared to BeginRegistration, BeginAddDevice uses the JWT to allow the registration.
 func (s *Service) BeginAddDevice() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		claims, ok := auth.GetClaimsFromRequest(r)
+		claims, ok := jwt.GetClaimsFromRequest(r)
 		if !ok {
 			http.Error(w, "session not found", http.StatusForbidden)
 			return
@@ -365,7 +364,7 @@ func (s *Service) BeginAddDevice() http.HandlerFunc {
 // We complete the registration.
 func (s *Service) FinishAddDevice() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		claims, ok := auth.GetClaimsFromRequest(r)
+		claims, ok := jwt.GetClaimsFromRequest(r)
 		if !ok {
 			http.Error(w, "session not found", http.StatusForbidden)
 			return
@@ -431,7 +430,7 @@ func (s *Service) FinishAddDevice() http.HandlerFunc {
 		}
 
 		cookie := &http.Cookie{
-			Name:     auth.TokenCookieKey,
+			Name:     jwt.TokenCookieKey,
 			Value:    token,
 			Path:     "/",
 			Expires:  time.Now().Add(jwt.ExpiresDuration),
@@ -458,7 +457,7 @@ func (s *Service) DeleteDevice() http.HandlerFunc {
 			return
 		}
 
-		claims, ok := auth.GetClaimsFromRequest(r)
+		claims, ok := jwt.GetClaimsFromRequest(r)
 		if !ok {
 			http.Error(w, "session not found", http.StatusForbidden)
 			return
diff --git a/handler/handler_counter.go b/handler/handler_counter.go
index f5b342b..2a9bf7d 100644
--- a/handler/handler_counter.go
+++ b/handler/handler_counter.go
@@ -5,14 +5,14 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/Darkness4/auth-htmx/auth"
 	"github.com/Darkness4/auth-htmx/database/counter"
+	"github.com/Darkness4/auth-htmx/jwt"
 )
 
 // Count increments the counter and returns the new value.
 func Count(counter counter.Repository) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		claims, ok := auth.GetClaimsFromRequest(r)
+		claims, ok := jwt.GetClaimsFromRequest(r)
 		if !ok {
 			http.Error(w, "not allowed", http.StatusUnauthorized)
 			return
diff --git a/jwt/jwt.go b/jwt/jwt.go
index 08eb5c0..66325f1 100644
--- a/jwt/jwt.go
+++ b/jwt/jwt.go
@@ -2,13 +2,22 @@
 package jwt
 
 import (
+	"context"
 	"fmt"
+	"net/http"
 	"time"
 
 	"github.com/go-webauthn/webauthn/webauthn"
 	"github.com/golang-jwt/jwt/v5"
 )
 
+const (
+	// TokenCookieKey is the key of the cookie stored in the context.
+	TokenCookieKey = "session_token"
+)
+
+type claimsContextKey struct{}
+
 // ExpiresDuration is the duration when a user session expires.
 const ExpiresDuration = 24 * time.Hour
 
@@ -106,3 +115,32 @@ func (s Secret) VerifyToken(tokenString string) (*Claims, error) {
 
 	return nil, fmt.Errorf("invalid token")
 }
+
+// Middleware is an authentication guard for HTTP servers.
+func (jwt Secret) Middleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Get the JWT token from the request header
+		cookie, err := r.Cookie(TokenCookieKey)
+		if err != nil {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		// Verify the JWT token
+		claims, err := jwt.VerifyToken(cookie.Value)
+		if err != nil {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		// Store the claims in the request context for further use
+		ctx := context.WithValue(r.Context(), claimsContextKey{}, *claims)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+// GetClaimsFromRequest is a helper function to fetch the JWT session token from an HTTP request.
+func GetClaimsFromRequest(r *http.Request) (claims Claims, ok bool) {
+	claims, ok = r.Context().Value(claimsContextKey{}).(Claims)
+	return claims, ok
+}
diff --git a/main.go b/main.go
index 6836b67..603186d 100644
--- a/main.go
+++ b/main.go
@@ -133,25 +133,8 @@ var app = &cli.App{
 
 		// Router
 		r := chi.NewRouter()
+		r.Use(jwt.Secret(jwtSecret).Middleware)
 		r.Use(hlog.NewHandler(log.Logger))
-		r.Use(authService.Middleware)
-
-		// Auth Guard
-		r.Use(func(next http.Handler) http.Handler {
-			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				_, isAuth := auth.GetClaimsFromRequest(r)
-
-				if !isAuth {
-					switch r.URL.Path {
-					case "/counter":
-						http.Error(w, "unauthorized", http.StatusUnauthorized)
-						return
-					}
-				}
-
-				next.ServeHTTP(w, r)
-			})
-		})
 
 		// DB
 		d, err := sql.Open("sqlite", dbFile)
@@ -166,7 +149,7 @@ var app = &cli.App{
 
 		// Auth
 		r.Get("/login", authService.Login())
-		r.Get("/logout", authService.Logout())
+		r.Get("/logout", auth.Logout)
 		r.Get("/callback", authService.CallBack())
 
 		u, err := url.Parse(publicURL)
@@ -217,7 +200,7 @@ var app = &cli.App{
 			path := filepath.Clean(r.URL.Path)
 			path = filepath.Clean(fmt.Sprintf("pages/%s/page.tmpl", path))
 
-			claims, _ := auth.GetClaimsFromRequest(r)
+			claims, _ := jwt.GetClaimsFromRequest(r)
 
 			// Check if SSR
 			var base string