diff --git a/CHANGELOG.md b/CHANGELOG.md
index bec9119a..46eef4ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,8 @@ X.Y.Z Release notes
 * Fix a bug where `Realm.open` could unexpectedly raise a "Realm at path ... already opened with different schema version" error.
 
 ### Internal
-* None
+* Updated to Realm Core 5.0.1.
+* Updated to Realm Sync 2.2.1.
 
 2.1.1 Release notes (2017-12-15)
 =============================================================
diff --git a/dependencies.list b/dependencies.list
index 948574b0..c919a5e2 100644
--- a/dependencies.list
+++ b/dependencies.list
@@ -1,5 +1,5 @@
 PACKAGE_NAME=realm-js
 VERSION=2.1.1
-REALM_CORE_VERSION=4.0.2
-REALM_SYNC_VERSION=2.1.10
+REALM_CORE_VERSION=5.0.1
+REALM_SYNC_VERSION=2.2.1
 REALM_OBJECT_SERVER_VERSION=2.0.21
diff --git a/src/object-store b/src/object-store
index d681b1fb..21e671a1 160000
--- a/src/object-store
+++ b/src/object-store
@@ -1 +1 @@
-Subproject commit d681b1fb8a8ca7a8db1ab1edc25771d984795ebe
+Subproject commit 21e671a155989f4e34e279fc8a7ace5817495de0