diff --git a/changelog/change_mark_style_mutable_constant_as_unsafe.md b/changelog/change_mark_style_mutable_constant_as_unsafe.md
new file mode 100644
index 00000000000..f56a20a0a7e
--- /dev/null
+++ b/changelog/change_mark_style_mutable_constant_as_unsafe.md
@@ -0,0 +1 @@
+* [#9331](https://github.com/rubocop-hq/rubocop/pull/9331): Mark `Style/MutableConstant` as unsafe. ([@koic][])
diff --git a/config/default.yml b/config/default.yml
index 68cc8300ea9..903d772ab8a 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -3735,7 +3735,8 @@ Style/MutableConstant:
   Description: 'Do not assign mutable objects to constants.'
   Enabled: true
   VersionAdded: '0.34'
-  VersionChanged: '0.65'
+  VersionChanged: <<next>>
+  SafeAutoCorrect: false
   EnforcedStyle: literals
   SupportedStyles:
     # literals: freeze literals assigned to constants