diff --git a/composer.json b/composer.json
index 73cb512b1..508132f09 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
         "pear/http_request2": "^2.6.0",
         "pear/net_dns2": "^1.5.4",
         "php81_bc/strftime": "^0.7.4",
-        "smarty/smarty": "^4.3.4",
+        "smarty/smarty": "^5.1.0",
         "voku/simple-cache": "^4.1.0"
     },
     "minimum-stability": "dev",
diff --git a/composer.lock b/composer.lock
index 5c712a422..965183cbf 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c55c15aac639375a80565314ca6f6b57",
+    "content-hash": "eed236472d2502f9e0e8cefcc75dc2f9",
     "packages": [
         {
             "name": "katzgrau/klogger",
@@ -444,35 +444,39 @@
         },
         {
             "name": "smarty/smarty",
-            "version": "v4.5.1",
+            "version": "v5.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/smarty-php/smarty.git",
-                "reference": "42b869e3a098b1c8ee07922ccded0e5a5dceadcd"
+                "reference": "8d53d3cbf2a986f392d680349be0fc22661bf16c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/smarty-php/smarty/zipball/42b869e3a098b1c8ee07922ccded0e5a5dceadcd",
-                "reference": "42b869e3a098b1c8ee07922ccded0e5a5dceadcd",
+                "url": "https://api.github.com/repos/smarty-php/smarty/zipball/8d53d3cbf2a986f392d680349be0fc22661bf16c",
+                "reference": "8d53d3cbf2a986f392d680349be0fc22661bf16c",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1 || ^8.0"
+                "php": "^7.2 || ^8.0",
+                "symfony/polyfill-mbstring": "^1.27"
             },
             "require-dev": {
                 "phpunit/phpunit": "^8.5 || ^7.5",
-                "smarty/smarty-lexer": "^3.1"
+                "smarty/smarty-lexer": "^4.0.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0.x-dev"
+                    "dev-master": "5.0.x-dev"
                 }
             },
             "autoload": {
-                "classmap": [
-                    "libs/"
-                ]
+                "files": [
+                    "src/functions.php"
+                ],
+                "psr-4": {
+                    "Smarty\\": "src/"
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -504,9 +508,89 @@
             "support": {
                 "forum": "https://github.com/smarty-php/smarty/discussions",
                 "issues": "https://github.com/smarty-php/smarty/issues",
-                "source": "https://github.com/smarty-php/smarty/tree/v4.5.1"
+                "source": "https://github.com/smarty-php/smarty/tree/v5.1.0"
+            },
+            "time": "2024-04-22T22:22:15+00:00"
+        },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.29.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "9773676c8a1bb1f8d4340a62efe641cf76eda7ec"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/9773676c8a1bb1f8d4340a62efe641cf76eda7ec",
+                "reference": "9773676c8a1bb1f8d4340a62efe641cf76eda7ec",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "provide": {
+                "ext-mbstring": "*"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                }
             },
-            "time": "2024-03-18T14:19:07+00:00"
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.29.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-01-29T20:11:03+00:00"
         },
         {
             "name": "voku/simple-cache",