diff --git a/handlers/google_auth.go b/handlers/google_auth.go
index af305f3..de7877f 100644
--- a/handlers/google_auth.go
+++ b/handlers/google_auth.go
@@ -615,7 +615,13 @@ func LogoutHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	token, err := jwt.ParseWithClaims(tokenString, &models.AccessToken{}, func(token *jwt.Token) (interface{}, error) {
-		return []byte(os.Getenv("JWT_SECRET_KEY")), nil
+		if _, ok := token.Method.(*jwt.SigningMethodRSA); !ok {
+			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
+		}
+		if rsaPrivateKey == nil {
+			return nil, errors.New("RSA private key is not initialized")
+		}
+		return &rsaPrivateKey.PublicKey, nil
 	})
 
 	if err == nil {