diff --git a/composer.json b/composer.json
index a9c2047..432c609 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "php": "~5.6|~7.0",
         "illuminate/contracts": "5.1.*|5.2.*|5.3.*|5.4.*",
         "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*",
-        "lstrojny/fxmlrpc": "^0.14.0",
+        "lstrojny/fxmlrpc": "~0.13.0|~0.14.0",
         "php-http/guzzle6-adapter": "^1.1",
         "php-http/message": "^1.5",
         "zendframework/zend-diactoros": "^1.3"