diff --git a/apps/common/management/commands/services/services/gunicorn.py b/apps/common/management/commands/services/services/gunicorn.py
index fe884099ffb..8a84317f190 100644
--- a/apps/common/management/commands/services/services/gunicorn.py
+++ b/apps/common/management/commands/services/services/gunicorn.py
@@ -29,6 +29,9 @@ def cmd(self):
             '--max-requests-jitter', '2048',
             '--timeout', '30',
             '--graceful-timeout', '300',
+            # gunicorn's default of 4094 bytes rejects long-but-legitimate request
+            # lines (e.g. hundreds of knowledge_ids[] params); 8190 is the max it accepts.
+            '--limit-request-line', '8190',
             '--access-logformat', log_format,
             '--access-logfile', '/dev/null',
             '--error-logfile', '-'