diff --git a/CHANGES.md b/CHANGES.md
index 86f725e3..65fa732f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,9 @@
+2020-04-28, Version 4.21.1
+==========================
+
+ * types: make DataSource.stop compatible with LB4 (Miroslav Bajtoš)
+
+
 2020-04-27, Version 4.21.0
 ==========================
 
diff --git a/package.json b/package.json
index 38615bae..319229d3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "loopback-datasource-juggler",
-  "version": "4.21.0",
+  "version": "4.21.1",
   "publishConfig": {
     "export-tests": true
   },