diff --git a/source/reference/limitations.txt b/source/reference/limitations.txt
index 6c23e6ec5..82a614432 100644
--- a/source/reference/limitations.txt
+++ b/source/reference/limitations.txt
@@ -86,7 +86,9 @@ discuss your requirements.
 Unsupported Collection Types
 ----------------------------
 
-- Time-series collections aren't supported.
+- ``mongosync`` 1.7 and earlier don't support time-series collections.
+  Starting in ``mongosync`` 1.8, time series collections are
+  synchronized between clusters.
 - Clustered collections with :ref:`expireAfterSeconds
   <db.createCollection.expireAfterSeconds>` set aren't supported.
 
diff --git a/source/release-notes/1.8.txt b/source/release-notes/1.8.txt
index a5539d2f9..ec7901ce6 100644
--- a/source/release-notes/1.8.txt
+++ b/source/release-notes/1.8.txt
@@ -23,6 +23,11 @@ Release Notes for mongosync 1.8
 
 New Features:
 
+Time Series Collections
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in ``mongosync`` 1.8.0, time series collections are
+synchronized between clusters.
 
 Minimum Supported Version
 -------------------------