diff --git a/CHANGELOG b/CHANGELOG
index 306ad2b1964f137c97a8824349f6d813ad05812b..f3bb1ee5f132fe7c19cd16ab2db1d4032495383b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -99,6 +99,7 @@ v 8.12.0 (unreleased)
 v 8.11.5 (unreleased)
   - Optimize branch lookups and force a repository reload for Repository#find_branch
   - Fix member expiration date picker after update
+  - Make merge conflict file size limit 200 KB, to match the docs
   - Fix suggested colors options for new labels in the admin area. !6138
   - Fix GitLab import button
   - Remove gitorious from import_sources
diff --git a/lib/gitlab/conflict/parser.rb b/lib/gitlab/conflict/parser.rb
index 2d4d55daeeb998be824eed7385e62ac7b29f36fd..98e842cded36d2db71b0ef8dc1ce1a78aab8a568 100644
--- a/lib/gitlab/conflict/parser.rb
+++ b/lib/gitlab/conflict/parser.rb
@@ -18,7 +18,7 @@ module Gitlab
 
       def parse(text, our_path:, their_path:, parent_file: nil)
         raise UnmergeableFile if text.blank? # Typically a binary file
-        raise UnmergeableFile if text.length > 102400
+        raise UnmergeableFile if text.length > 200.kilobytes
 
         begin
           text.to_json
diff --git a/spec/lib/gitlab/conflict/parser_spec.rb b/spec/lib/gitlab/conflict/parser_spec.rb
index a1d2ca1e27263080b4c883818e36447e1993c191..16eb376635644762dcb29f047b5a3149161f33f1 100644
--- a/spec/lib/gitlab/conflict/parser_spec.rb
+++ b/spec/lib/gitlab/conflict/parser_spec.rb
@@ -179,8 +179,8 @@ CONFLICT
           to raise_error(Gitlab::Conflict::Parser::UnmergeableFile)
       end
 
-      it 'raises UnmergeableFile when the file is over 100 KB' do
-        expect { parse_text('a' * 102401) }.
+      it 'raises UnmergeableFile when the file is over 200 KB' do
+        expect { parse_text('a' * 204801) }.
           to raise_error(Gitlab::Conflict::Parser::UnmergeableFile)
       end