diff --git a/CHANGES.md b/CHANGES.md
index 010f02a..811c1e5 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+0.3.1.1-r4 (19 Feb 2025)
+------------------------
+
+  - Allow `base-4.21` and test on GHC 9.12
+
 0.3.1.1-r3 (11 June 2024)
 ------------------------