diff --git a/composer.json b/composer.json
index 53d3818..e80053b 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "php": ">=5.3.0"
   },
   "require-dev": {
-        "tedivm/dovecottesting": "dev-master"
+        "tedivm/dovecottesting": "~1"
     },
   "autoload": {
     "psr-0": {"Fetch": "src/"}