diff --git a/composer.json b/composer.json
index bffc7bde..90ea1983 100644
--- a/composer.json
+++ b/composer.json
@@ -52,7 +52,10 @@
         "react/stream": "^1.3",
         "shardj/zf1-future": "^1.23.5",
         "tedivm/jshrink": "^1.6.8",
-        "wikimedia/less.php": "^3.2.1"
+        "wikimedia/less.php": "^3.2.1",
+        "simshaun/recurr": "^5",
+        "dragonmantank/cron-expression": "^3",
+        "psr/log": "^1"
     },
     "require-dev": {
     },