diff --git a/NEWS b/NEWS
index 38245f743a..c4a1405107 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,28 @@
+libmongoc 1.21.0
+================
+
+Bug Fixes:
+  * Addressed VS 2013 build failures due to missing C99 features.
+
+Features:
+ * Support conditional $merge and $out aggregation on secondaries.
+ * Bump minimum wire protocol version from 3 (MongoDB 3.0) to 6 (MongoDB 3.6).
+ * Bump maximum wire protocol version from 14 (MongoDB 5.1) to 15 (MongODB 5.2).
+
+Improvements:
+ * Update algorithm used for generation of OID values to reduce collisions.
+
+Thanks to everyone who contributed to the development of this release.
+
+  * Ezra Chung
+  * Colby Pike
+  * Kevin Albertson
+  * Roberto C. Sánchez
+  * David CARLIER
+  * Jeremy Mikola
+
+
+
 libmongoc 1.20.1
 ================
 
diff --git a/src/libbson/NEWS b/src/libbson/NEWS
index 4936f56118..c45500433a 100644
--- a/src/libbson/NEWS
+++ b/src/libbson/NEWS
@@ -1,3 +1,23 @@
+libbson 1.21.0
+==============
+
+Bug Fixes:
+  * Addressed VS 2013 build failures due to missing C99 features.
+
+Improvements:
+  * Addressed -Wstrict-prototype warnings in bson-atomic.h.
+  * Addressed incompatible pointer warnings in bson-atomic.h on GCC 4.8.5.
+
+Thanks to everyone who contributed to the development of this release.
+
+  * Ezra Chung
+  * Kevin Albertson
+  * Colby Pike
+  * Pau Espin Pedrol
+  * Ryan Schmidt
+
+
+
 libbson 1.20.1
 ==============
 
diff --git a/src/libmongoc/doc/libbson-objects.inv b/src/libmongoc/doc/libbson-objects.inv
index 5d54a170df..c8e36e6c0d 100644
Binary files a/src/libmongoc/doc/libbson-objects.inv and b/src/libmongoc/doc/libbson-objects.inv differ