diff --git a/changelog.md b/changelog.md
index a55f5d4..e4e6329 100644
--- a/changelog.md
+++ b/changelog.md
@@ -2,13 +2,14 @@
 
 ## Next
 - Changed the CLI result to say 'not present' instead of 'not known' for versions that do not use a pack format.
+- Updated data back format to `29`.
 
 ## 1.3.12
 *2024-01-23*
 - Changed the CLI result to say 'not known' instead of 'undefined' for versions without associated pack formats.
 - Fixed the result of `--latest` not always returning the very latest version.
 - Updated resource pack format to `24`.
-- Updated data pack format to `26`.
+- Updated data pack format to `28`.
 
 ## 1.3.11
 *2024-01-03*
diff --git a/src/index.ts b/src/index.ts
index cede4b6..df2a5a5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -56,6 +56,7 @@ const START_SNAPSHOTS: Record<string, Record<PackType, FormatResult>> = {
     '23w46a': { resource: 21, data: 25 },
     '23w51a': { resource: 22, data: 27 },
     '24w03a': { resource: 24, data: 28 },
+    '24w04a': { resource: 24, data: 29 },
     [fauxCurrentSnapshot]: { resource: undefined, data: undefined },
 }