---
title: Go-SDK - 1.8.1
slug: feature-experimentation/release-notes/go-sdk-1-8-1
docTags: 
createdAt: 2026-07-20T15:44:34.767Z
---

## [#181---august-29-2022](docId\:gVV2A_SxA5t2uOx5Jht5a)\[1.8.1] - August 29, 2022

### [#bug-fix](docId\:gVV2A_SxA5t2uOx5Jht5a)Bug Fix

- Add validation for user attribute types when building an event object. Only allow primitive types ([#339](https://github.com/optimizely/go-sdk/pull/339))

[https://github.com/optimizely/go-sdk/releases/tag/v1.8.1](https://github.com/optimizely/go-sdk/releases/tag/v1.8.1)