diff --git a/composer.json b/composer.json
index 24deb0f3..fd1d472e 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         "symfony/yaml": "^5.0",
         "google/cloud-storage": "^1.12",
         "opencensus/opencensus-exporter-stackdriver": "^0.1.0",
-        "smarty/smarty": "^4.5.3",
+        "smarty/smarty": "^5.4.5",
         "sendgrid/sendgrid": "^7.3",
         "google/cloud-logging": "^1.18",
         "auth0/auth0-php": "^8.0.5",
diff --git a/composer.lock b/composer.lock
index 23c67916..34b2ee31 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": "3460293222cae02a76703c727342fc4f",
+    "content-hash": "91e002c0d18d4ca9010272e7bd080db3",
     "packages": [
         {
             "name": "auth0/auth0-php",
@@ -4841,35 +4841,39 @@
         },
         {
             "name": "smarty/smarty",
-            "version": "v4.5.3",
+            "version": "v5.4.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/smarty-php/smarty.git",
-                "reference": "9fc96a13dbaf546c3d7bcf95466726578cd4e0fa"
+                "reference": "e26f82d02c4d18fc82094c28fbc65f711e39ed5d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/smarty-php/smarty/zipball/9fc96a13dbaf546c3d7bcf95466726578cd4e0fa",
-                "reference": "9fc96a13dbaf546c3d7bcf95466726578cd4e0fa",
+                "url": "https://api.github.com/repos/smarty-php/smarty/zipball/e26f82d02c4d18fc82094c28fbc65f711e39ed5d",
+                "reference": "e26f82d02c4d18fc82094c28fbc65f711e39ed5d",
                 "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": [
@@ -4901,9 +4905,15 @@
             "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/v4.5.3"
+                "source": "https://github.com/smarty-php/smarty/tree/v5.4.5"
             },
-            "time": "2024-05-28T21:46:01+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/wisskid",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-04-15T11:20:08+00:00"
         },
         {
             "name": "starkbank/ecdsa",