diff --git a/composer.json b/composer.json
index 0410f1dd..2c88e34e 100755
--- a/composer.json
+++ b/composer.json
@@ -36,6 +36,7 @@
         "league/glide": "^1.4",
         "slim/slim": "^3.0",
         "slim/twig-view": "^2.4",
+        "slim/flash": "^0.4.0",
         "league/glide-slim": "^1.0",
         "league/event": "^2.2"
     },