diff --git a/app/models/event.rb b/app/models/event.rb
index bc4c41d9..325fecb8 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -2,4 +2,7 @@ class Event < ActiveRecord::Base
   belongs_to :user, polymorphic: true
   belongs_to :exercise
   belongs_to :file
+
+  validates :category, presence: true
+  validates :data, presence: true
 end