1 files changed, 4 insertions, 4 deletions
diff --git a/app/models/diff_discussion.rb b/app/models/diff_discussion.rb
index f4d665cf279..041ec98ffc9 100644
--- a/app/models/diff_discussion.rb
+++ b/app/models/diff_discussion.rb
@@ -37,18 +37,18 @@ class DiffDiscussion < Discussion
 
   def reply_attributes
     super.merge(
-      original_position: original_position.to_json,
-      position: position.to_json
+      original_position: Gitlab::Json.dump(original_position),
+      position: Gitlab::Json.dump(position)
     )
   end
 
   def cache_key
-    positions_json = diff_note_positions.map { |dnp| dnp.position.to_json }
+    positions_json = diff_note_positions.map { |dnp| Gitlab::Json.dump(dnp.position) }
     positions_sha = Digest::SHA1.hexdigest(positions_json.join(':')) if positions_json.any?
 
     [
       super,
-      Digest::SHA1.hexdigest(position.to_json),
+      Digest::SHA1.hexdigest(Gitlab::Json.dump(position)),
       positions_sha
     ].join(':')
   end