diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61e66e4c..e39eab5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 3.9.9 - 2023-10-12
+
+### Changed
+
+- `orjson` module metadata explicitly marks subinterpreters as not supported.
+
 
 ## 3.9.8 - 2023-10-10
 
diff --git a/Cargo.lock b/Cargo.lock
index e5dd648c..57f704e7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -165,7 +165,7 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "orjson"
-version = "3.9.8"
+version = "3.9.9"
 dependencies = [
  "ahash",
  "arrayvec",
diff --git a/Cargo.toml b/Cargo.toml
index 48ced59e..8dfc6289 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "orjson"
-version = "3.9.8"
+version = "3.9.9"
 authors = ["ijl <ijl@mailbox.org>"]
 description = "Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy"
 edition = "2021"