diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72907a1..d0eedeb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## master / unreleased
 
 * [CHANGE] Enables query-scheduler by default
+* [CHANGE] Enables bucket-index by default
 
 ## 1.13.2 / 2023-04-29
 
diff --git a/cortex/tsdb-config.libsonnet b/cortex/tsdb-config.libsonnet
index 99b8abb..f4779fa 100644
--- a/cortex/tsdb-config.libsonnet
+++ b/cortex/tsdb-config.libsonnet
@@ -23,7 +23,7 @@
 
     // Enable use of bucket index by querier, ruler and store-gateway.
     // Bucket index is generated by compactor from Cortex 1.7, there is no flag required to enable this on compactor.
-    cortex_bucket_index_enabled: false,
+    cortex_bucket_index_enabled: true,
   },
 
   // We should keep a number of idle connections equal to the max "get" concurrency,