diff --git a/changelogs/unreleased/5614-centos-6-deprecation.yml b/changelogs/unreleased/5614-centos-6-deprecation.yml
new file mode 100644
index 0000000000000000000000000000000000000000..4cee841fdefde0cb72b9d0666cc390123fbbf6c2_Y2hhbmdlbG9ncy91bnJlbGVhc2VkLzU2MTQtY2VudG9zLTYtZGVwcmVjYXRpb24ueW1s
--- /dev/null
+++ b/changelogs/unreleased/5614-centos-6-deprecation.yml
@@ -0,0 +1,5 @@
+---
+title: Add deprecation warning for CentOS 6
+merge_request: 4596
+author:
+type: deprecated
diff --git a/files/gitlab-cookbooks/package/libraries/omnibus_helper.rb b/files/gitlab-cookbooks/package/libraries/omnibus_helper.rb
index 1bf1c42824ea18aeec28ee9ee99262f4542cdfb6_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9wYWNrYWdlL2xpYnJhcmllcy9vbW5pYnVzX2hlbHBlci5yYg==..4cee841fdefde0cb72b9d0666cc390123fbbf6c2_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9wYWNrYWdlL2xpYnJhcmllcy9vbW5pYnVzX2hlbHBlci5yYg== 100644
--- a/files/gitlab-cookbooks/package/libraries/omnibus_helper.rb
+++ b/files/gitlab-cookbooks/package/libraries/omnibus_helper.rb
@@ -103,7 +103,8 @@
     # example: deprecated_os = { 'raspbian-8' => 'GitLab 11.8' }
     {
       'raspbian-9' => 'GitLab 13.4',
-      'debian-8' => 'GitLab 13.4'
+      'debian-8' => 'GitLab 13.4',
+      'centos-6' => 'GitLab 13.7'
     }
   end