diff --git a/.changeset/shaggy-monkeys-cover.md b/.changeset/shaggy-monkeys-cover.md
deleted file mode 100644
index 9513757cb..000000000
--- a/.changeset/shaggy-monkeys-cover.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"mobx": patch
----
-
-Shrink Atom and Reaction using a bitfield
diff --git a/packages/mobx/CHANGELOG.md b/packages/mobx/CHANGELOG.md
index 676c95603..7467b86a5 100644
--- a/packages/mobx/CHANGELOG.md
+++ b/packages/mobx/CHANGELOG.md
@@ -1,5 +1,11 @@
 # mobx
 
+## 6.13.1
+
+### Patch Changes
+
+-   [`5e711e0b4737fd6b5b3c6f9b32afd4f195bc5fc3`](https://github.com/mobxjs/mobx/commit/5e711e0b4737fd6b5b3c6f9b32afd4f195bc5fc3) [#3901](https://github.com/mobxjs/mobx/pull/3901) Thanks [@peterm-canva](https://github.com/peterm-canva)! - Shrink Atom and Reaction using a bitfield
+
 ## 6.13.0
 
 ### Minor Changes
diff --git a/packages/mobx/package.json b/packages/mobx/package.json
index 8137386f8..5a20e6689 100644
--- a/packages/mobx/package.json
+++ b/packages/mobx/package.json
@@ -1,6 +1,6 @@
 {
     "name": "mobx",
-    "version": "6.13.0",
+    "version": "6.13.1",
     "description": "Simple, scalable state management.",
     "source": "src/mobx.ts",
     "main": "dist/index.js",