diff --git a/composer.json b/composer.json
index 59870bad..634b52b9 100755
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,8 @@
         "league/glide": "^1.4",
         "slim/slim": "^3.0",
         "slim/twig-view": "^2.4",
-        "league/glide-slim": "^1.0"
+        "league/glide-slim": "^1.0",
+        "league/event": "^2.2"
     },
     "autoload": {
         "classmap": [