diff --git a/sentry/sentry.conf.example.py b/sentry/sentry.conf.example.py
index a0e989c..c6132cc 100644
--- a/sentry/sentry.conf.example.py
+++ b/sentry/sentry.conf.example.py
@@ -29,6 +29,8 @@ SENTRY_USE_BIG_INTS = True
 # and thus various UI optimizations should be enabled.
 SENTRY_SINGLE_ORGANIZATION = True
 
+SENTRY_OPTIONS["system.event-retention-days"] = env('SENTRY_EVENT_RETENTION_DAYS') or 90
+
 #########
 # Redis #
 #########