diff --git a/Resources/Prototypes/GameRules/events.yml b/Resources/Prototypes/GameRules/events.yml
index f438bf4633..30e2222b79 100644
--- a/Resources/Prototypes/GameRules/events.yml
+++ b/Resources/Prototypes/GameRules/events.yml
@@ -101,7 +101,7 @@
     id: MouseMigration
     earliestStart: 30
     minimumPlayers: 35
-    weightLow: 5
+    weight: 5
     maxOccurrences: 1
     endAfter: 50