diff --git a/composer.json b/composer.json
index 46ffdd801ff9..ed9f9cb361a4 100644
--- a/composer.json
+++ b/composer.json
@@ -92,7 +92,7 @@
     "symfony/filesystem": "^v5.4.3",
     "league/oauth2-google": "^4.0",
     "thenetworg/oauth2-azure": "^2.1",
-    "webklex/php-imap": "^5.3",
+    "webklex/php-imap": "^4.0",
     "bogdaan/open-location-code": "dev-master"
   },
   "suggest": {