diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5e1d0b..244b745 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## v3.1.0 5th July 2024
+
+- Release based on Onfido OpenAPI spec version [v3.1.0](https://github.com/onfido/onfido-openapi-spec/releases/tag/v3.1.0):
+  - Add missing fields in document report's properties
+
 ## v3.0.0 24th June 2024
 
 - Library has been rebuilt from scratch and automatically generated on [Onfido OpenAPI Spec](https://github.com/onfido/onfido-openapi-spec) (release [v3.0.0](https://github.com/onfido/onfido-openapi-spec/releases/tag/v3.0.0))