diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f61d1f..6b378c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,20 @@
 # What's New:
 
-- Port to Minecraft 1.21.10
\ No newline at end of file
+- Port to Minecraft 1.21.10
+
+## ExtraCodecs
+
+This port removes `fromJsonSerializer` and other `JsonSerializer` related methods, 
+as `JsonSerializer` is no longer a thing.
+
+## ReloaderType
+
+Removed `TagManager` and `LootDataManager` types, as those were moved to 
+dynamic registries.
+
+## SavedData
+
+Removed `SavedDataHelper`, as SavedData was refactored into using datafixerupper codecs,
+making this class obsolete.
+
+Additionally, Fabric provides a data attachment API, which is a (better) replacement for those classes.