diff --git a/src/Dal/UserDal.php b/src/Dal/UserDal.php
index 17e2871..e8949f2 100644
--- a/src/Dal/UserDal.php
+++ b/src/Dal/UserDal.php
@@ -30,7 +30,7 @@ public static function create(UserEntity $userEntity): string|false
 
         try {
             $redBeanIncrementId = R::store($userBean);
-        } catch (SQL $e) {
+        } catch (SQL) { // since PHP 8, we can omit the caught variable (e.g. SQL $e)
             return false;
         } finally {
             R::close();
@@ -68,7 +68,7 @@ public static function update(string $userUuid, UserEntity $userEntity): int|str
             // attempt to save the user
             try {
                 return R::store($userBean); // returns the user ID
-            } catch (SQL $e) {
+            } catch (SQL) { // PHP >=8.0 allows to omit the caught variable (e.g. SQL $e)
                 return false;
             } finally {
                 R::close();
diff --git a/src/Service/User.php b/src/Service/User.php
index 84caa17..3e2a974 100644
--- a/src/Service/User.php
+++ b/src/Service/User.php
@@ -59,7 +59,7 @@ public function login(mixed $data): array
 
                     try {
                         UserDal::setToken($jwtToken, $user->getUserUuid());
-                    } catch (Exception $e) {
+                    } catch (Exception) { // since PHP 8.0, we can omit the caught variable name (e.g. Exception $e)
                         throw new CannotLoginUserException('Cannot set token to user');
                     }