diff --git a/app/models/slacker.rb b/app/models/slacker.rb
index e1b7bfd..a55cfe2 100644
--- a/app/models/slacker.rb
+++ b/app/models/slacker.rb
@@ -14,7 +14,6 @@ def self.all
     slack_user_data.map { |data| self.new(data) }
   end
 
-
   def self.find_by_email(email)
     all.select { |m| m.email == email }.first
   end
diff --git a/lib/tasks/users.rake b/lib/tasks/users.rake
new file mode 100644
index 0000000..fe158ab
--- /dev/null
+++ b/lib/tasks/users.rake
@@ -0,0 +1,11 @@
+desc "Update Slack avatars"
+task :update_slack_avatars => [:dependent, :tasks] do
+  users_with_broken_avatars = User.all.reject do |user|
+    Faraday.get(user.image).status == 200
+  end
+
+  users_with_broken_avatars.each do |user|
+    user.image = Slacker.find_by_id(user.slack_id).image
+    user.save
+  end
+end