diff --git a/composer.lock b/composer.lock
index 1ab8a7e..7bae786 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": "6f36f01de08f5617a5885f30e40f0cd3",
+    "content-hash": "38f1c2b6735ee567e282dd52a4447268",
     "packages": [
         {
             "name": "kigkonsult/icalcreator",
@@ -346,7 +346,8 @@
         "ext-curl": "*",
         "ext-pdo": "*",
         "ext-dom": "*",
-        "ext-libxml": "*"
+        "ext-libxml": "*",
+        "ext-ctype": "*"
     },
     "platform-dev": [],
     "plugin-api-version": "2.3.0"