diff --git a/plugins/kolab_sso/composer.json b/plugins/kolab_sso/composer.json
index 4b2185fc..01e247d0 100644
--- a/plugins/kolab_sso/composer.json
+++ b/plugins/kolab_sso/composer.json
@@ -1,27 +1,27 @@
 {
     "name": "kolab/kolab_sso",
     "type": "roundcube-plugin",
     "description": "Single Sign On for Kolab",
     "homepage": "https://git.kolab.org/diffusion/RPK/",
     "license": "AGPLv3",
     "version": "3.5.4",
     "authors": [
         {
             "name": "Aleksander Machniak",
             "email": "machniak@kolabsys.com",
             "role": "Lead"
         }
     ],
     "repositories": [
         {
             "type": "composer",
             "url": "https://plugins.roundcube.net"
         }
     ],
     "require": {
         "php": ">=5.3.0",
         "roundcube/plugin-installer": ">=0.1.3",
         "kolab/libkolab": ">=3.4.0",
-        "pear/http_request2": "~2.3.0"
+        "pear/http_request2": "~2.5.0"
     }
 }