diff --git a/composer.json b/composer.json
index 714a2ff5..e4dd7ddd 100644
--- a/composer.json
+++ b/composer.json
@@ -49,7 +49,6 @@
     },
     "suggest": {
         "decomplexity/SendOauth2": "Adapter for using XOAUTH2 authentication",
-        "ext-iconv": "To support UTF-8 if the mbstring PHP extension is not enabled",
         "ext-mbstring": "Needed to send email in multibyte encoding charset or decode encoded addresses",
         "ext-openssl": "Needed for secure SMTP sending and DKIM signing",
         "greew/oauth2-azure-provider": "Needed for Microsoft Azure XOAUTH2 authentication",