diff --git a/composer.json-dist b/composer.json-dist
index 192551a57..13064ce8f 100644
--- a/composer.json-dist
+++ b/composer.json-dist
@@ -1,31 +1,36 @@
 {
     "name": "roundcube/roundcubemail",
     "description": "The Roundcube Webmail suite",
     "license": "GPL-3.0+",
     "repositories": [
         {
             "type": "composer",
             "url": "https://plugins.roundcube.net"
         }
     ],
     "require": {
         "php": ">=5.4.0 <8",
         "pear/pear-core-minimal": "~1.10.1",
         "pear/auth_sasl": "~1.1.0",
         "pear/net_idna2": "~0.2.0",
         "pear/mail_mime": "~1.10.0",
         "pear/net_smtp": "~1.8.1",
         "pear/crypt_gpg": "~1.6.3",
         "pear/net_sieve": "~1.4.3",
         "roundcube/plugin-installer": "~0.2.0",
         "masterminds/html5": "~2.5.0",
         "endroid/qr-code": "~1.6.5"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.36 || ^5.7.21"
     },
     "suggest": {
         "kolab/net_ldap3": "~1.1.1 required for connecting to LDAP",
         "mkopinsky/zxcvbn-php": "^4.4.2 required for Zxcvbn password strength driver"
+    },
+    "config": {
+        "allow-plugins": {
+            "roundcube/plugin-installer": true
+        }
     }
 }