diff --git a/composer.json b/composer.json
index 7ba3b52..e7a6916 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "extra" : {
         "lean" : {
             "autoload": {
-                "definition" : [
+                "definitions" : [
                     { "\\Lean\\Console\\Lean" : "definitions" }
                 ]
             }