diff --git a/tasks/changelog.rb b/tasks/changelog.rb
index 3581b17b51..49b490ad3d 100644
--- a/tasks/changelog.rb
+++ b/tasks/changelog.rb
@@ -129,9 +129,9 @@ def merge_content
   end
 
   def new_contributor_lines
-    contributors
-      .map { |user| format(CONTRIBUTOR, user: user) }
-      .reject { |line| @rest.include?(line) }
+    unique_contributor_names = contributors.map { |user| format(CONTRIBUTOR, user: user) }.uniq
+
+    unique_contributor_names.reject { |line| @rest.include?(line) }
   end
 
   def contributors