diff --git a/composer.json b/composer.json
index 8af4554..eb6b77e 100644
--- a/composer.json
+++ b/composer.json
@@ -14,6 +14,7 @@
     "require": {
         "php": ">=5.3.0",
         "cpliakas/psolr": ">=0.4",
+        "guzzlehttp/guzzle": "~5.0",
         "guzzle/service": "~3.0",
         "lstrojny/fxmlrpc": ">=0.8,<0.9",
         "pear/net_dns2": "1.3.2",