diff --git a/composer.json b/composer.json
index d33a344..8e24536 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "symfony/http-foundation": "^3.4 | ^4.1",
         "symfony/http-kernel": "^3.4 | ^4.1",
         "symfony/config": "^3.4 | ^4.1",
-        "plivo/plivo-php": "^4.0.0"
+        "plivo/plivo-php": "^4.0"
     },
     "autoload": {
         "psr-0": {