diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33992a666..88ee871d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,7 +21,7 @@
 [support#397]: https://github.com/pybricks/support/issues/397
 [support#501]: https://github.com/pybricks/support/issues/501
 
-## [3.1.0b1] - 2021-08-21
+## [3.1.0b1] - 2021-09-21
 
 ### Added
 - Support for LEGO Technic Color Light Matrix ([support#440]).