diff --git a/changelog/v5.3.1.md b/changelog/v5.3.1.md
new file mode 100644
index 0000000000..ac7aebcf37
--- /dev/null
+++ b/changelog/v5.3.1.md
@@ -0,0 +1,6 @@
+# 5.3.1
+
+The 5.3.1 release is a patch that addresses an issue when using `angular-cli` to build an OpenLayers-based application.
+
+ * [#9253](https://github.com/openlayers/openlayers/pull/9253) - Add proj.js to the sideEffects list ([@romanzoller](https://github.com/romanzoller))
+
diff --git a/package.json b/package.json
index 0af8897237..f684b1c110 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "5.3.0",
+  "version": "5.3.1",
   "description": "OpenLayers mapping library",
   "keywords": [
     "map",