diff --git a/app/models/user.rb b/app/models/user.rb
index 0ae4d3290..71db4ee2e 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -36,17 +36,6 @@ class User < ActiveRecord::Base
   scope :officials,      -> { where("official_level > 0") }
   scope :for_render,     -> { includes(:organization) }
 
-  after_update :touch_debates, :touch_comments
-  after_touch :touch_debates, :touch_comments
-
-  def touch_debates
-    debates.map(&:touch)
-  end
-
-  def touch_comments
-    comments.map(&:touch)
-  end
-
   def self.find_for_oauth(auth, signed_in_resource = nil)
     # Get the identity and user if they exist
     identity = Identity.find_for_oauth(auth)
diff --git a/app/views/comments/_comment.html.erb b/app/views/comments/_comment.html.erb
index 239ce50f8..a84aebb63 100644
--- a/app/views/comments/_comment.html.erb
+++ b/app/views/comments/_comment.html.erb
@@ -1,4 +1,4 @@
-<% cache [locale_and_user_status, comment, @commentable, (@comment_flags[comment.id] if @comment_flags)] do %>
+<% cache [locale_and_user_status, comment, @commentable, comment.author, (@comment_flags[comment.id] if @comment_flags)] do %>
   <div class="row">
   	<div id="<%= dom_id(comment) %>" class="comment small-12 column">
 
diff --git a/app/views/debates/_comments.html.erb b/app/views/debates/_comments.html.erb
index 39ed635ba..9813ea4f8 100644
--- a/app/views/debates/_comments.html.erb
+++ b/app/views/debates/_comments.html.erb
@@ -1,4 +1,4 @@
-<% cache [locale_and_user_status, @all_visible_comments.map(&:cache_key), @debate.comments_count, @comment_flags.to_a] do %>
+<% cache [locale_and_user_status, @all_visible_comments, @all_visible_comments.map(&:author), @debate.comments_count, @comment_flags.to_a] do %>
   <section class="row-full comments">
     <div class="row">
       <div id="comments" class="small-12 column">
diff --git a/app/views/debates/show.html.erb b/app/views/debates/show.html.erb
index 1767266db..07f7504cf 100644
--- a/app/views/debates/show.html.erb
+++ b/app/views/debates/show.html.erb
@@ -1,4 +1,4 @@
-<% cache [locale_and_user_status, @debate, Flag.flagged?(current_user, @debate)] do %>
+<% cache [locale_and_user_status, @debate, @debate.author, Flag.flagged?(current_user, @debate)] do %>
   <section class="debate-show">
     <div id="<%= dom_id(@debate) %>" class="row">
       <div class="small-12 medium-9 column">
diff --git a/spec/models/comment_spec.rb b/spec/models/comment_spec.rb
index 8798f4935..0349992cf 100644
--- a/spec/models/comment_spec.rb
+++ b/spec/models/comment_spec.rb
@@ -52,18 +52,18 @@ describe Comment do
 
     it "should expire cache when the author is hidden" do
       expect { comment.user.hide }
-      .to change { comment.reload.updated_at }
+      .to change { [comment.reload.updated_at, comment.author.updated_at] }
     end
 
     it "should expire cache when the author changes" do
       expect { comment.user.update(username: "Isabel") }
-      .to change { comment.reload.updated_at }
+      .to change { [comment.reload.updated_at, comment.author.updated_at] }
     end
 
     it "should expire cache when the author's organization get verified" do
       create(:organization, user: comment.user)
       expect { comment.user.organization.verify }
-      .to change { comment.reload.updated_at}
+      .to change { [comment.reload.updated_at, comment.author.updated_at] }
     end
   end
 end
diff --git a/spec/models/debate_spec.rb b/spec/models/debate_spec.rb
index 951837956..39ba93e51 100644
--- a/spec/models/debate_spec.rb
+++ b/spec/models/debate_spec.rb
@@ -288,13 +288,13 @@ describe Debate do
 
     it "should expire cache when its author changes" do
       expect { debate.author.update(username: "Eva") }
-      .to change { debate.reload.updated_at }
+      .to change { [debate.reload.updated_at, debate.author.updated_at] }
     end
 
     it "should expire cache when the author's organization get verified" do
       create(:organization, user: debate.author)
       expect { debate.author.organization.verify }
-      .to change { debate.reload.updated_at}
+      .to change { [debate.reload.updated_at, debate.author.updated_at] }
     end
   end