diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f6c8616..479d48d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@
 	| garbageLeaseCleanupIntervalMillis   | 30 minutes | Interval at which to check if a lease is garbage (i.e trimmed past the stream's retention period) or not. |
 
 * Including an optimization to `KinesisShardSyncer` to only create leases for one layer of shards.
+* Changing default shard prioritization strategy to be `NoOpShardPrioritization` to allow prioritization of completed shards. Customers who are upgrading to this version and are reading from `TRIM_HORIZON` should continue using `ParentFirstPrioritization` while upgr    ading.
 * Upgrading version of AWS SDK to 2.13.X.
 * [#719](https://github.com/awslabs/amazon-kinesis-client/pull/719) Upgrading version of Google Protobuf to 3.11.4.
 * [#712](https://github.com/awslabs/amazon-kinesis-client/pull/712) Allowing KCL to consider lease tables in `UPDATING` healthy.
diff --git a/README.md b/README.md
index 4279d55e..98b4a31e 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,7 @@ To make it easier for developers to write record processors in other languages,
 	| garbageLeaseCleanupIntervalMillis   | 30 minutes | Interval at which to check if a lease is garbage (i.e trimmed past the stream's retention period) or not. |
 
 * Including an optimization to `KinesisShardSyncer` to only create leases for one layer of shards.
+* Changing default shard prioritization strategy to be `NoOpShardPrioritization` to allow prioritization of completed shards. Customers who are upgrading to this version and are reading from `TRIM_HORIZON` should continue using `ParentFirstPrioritization` while upgrading.
 * Upgrading version of AWS SDK to 2.13.X.
 * [#719](https://github.com/awslabs/amazon-kinesis-client/pull/719) Upgrading version of Google Protobuf to 3.11.4.
 * [#712](https://github.com/awslabs/amazon-kinesis-client/pull/712) Allowing KCL to consider lease tables in `UPDATING` healthy.