diff --git a/changelogs/unreleased/increase-unicorn-memory-killer-limits.yml b/changelogs/unreleased/increase-unicorn-memory-killer-limits.yml
new file mode 100644
index 0000000000000000000000000000000000000000..6d7d2df4f4a275f9a0d5afa79302ee9d32d2ac35
--- /dev/null
+++ b/changelogs/unreleased/increase-unicorn-memory-killer-limits.yml
@@ -0,0 +1,5 @@
+---
+title: Increase the memory limits used in the unicorn killer
+merge_request: 17948
+author:
+type: other
diff --git a/config.ru b/config.ru
index 7b15939c6ff93d09754f45f22935f14a7afaef3e..405d01863ac4b668f8870e6bd0cabccb4bcc6d95 100644
--- a/config.ru
+++ b/config.ru
@@ -7,8 +7,8 @@ if defined?(Unicorn)
     # Unicorn self-process killer
     require 'unicorn/worker_killer'
 
-    min = (ENV['GITLAB_UNICORN_MEMORY_MIN'] || 300 * 1 << 20).to_i
-    max = (ENV['GITLAB_UNICORN_MEMORY_MAX'] || 350 * 1 << 20).to_i
+    min = (ENV['GITLAB_UNICORN_MEMORY_MIN'] || 400 * 1 << 20).to_i
+    max = (ENV['GITLAB_UNICORN_MEMORY_MAX'] || 650 * 1 << 20).to_i
 
     # Max memory size (RSS) per worker
     use Unicorn::WorkerKiller::Oom, min, max