diff --git a/INSTALL b/INSTALL
index 2d8aee18f..a8527da92 100644
--- a/INSTALL
+++ b/INSTALL
@@ -23,7 +23,7 @@ REQUIREMENTS
    - Net_Socket 1.0.12 or newer
    - Net_IDNA2 0.1.1 or newer
    - Auth_SASL 1.0.6 or newer
-   - Net_Sieve 1.3.2 or newer (for managesieve plugin)
+   - Net_Sieve 1.4.3 or newer (for managesieve plugin)
    - Crypt_GPG 1.6.2 or newer (for enigma plugin)
    - Endroid/QrCode 1.6.0 or newer (https://github.com/endroid/QrCode)
 * php.ini options (see .htaccess file):
diff --git a/composer.json-dist b/composer.json-dist
index 8b7655f27..c99a72f09 100644
--- a/composer.json-dist
+++ b/composer.json-dist
@@ -17,7 +17,7 @@
         "pear/mail_mime": "~1.10.0",
         "pear/net_smtp": "~1.7.1",
         "pear/crypt_gpg": "~1.6.2",
-        "pear/net_sieve": "~1.4.0",
+        "pear/net_sieve": "~1.4.3",
         "roundcube/plugin-installer": "~0.1.6",
         "endroid/qr-code": "~1.6.5"
     },