diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2789b6b5c810b0..4b4e64ae788cc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,7 +36,8 @@ release.
 </tr>
 <tr>
   <td valign="top">
-<b><a href="doc/changelogs/CHANGELOG_V21.md#21.6.0">21.6.0</a></b><br/>
+<b><a href="doc/changelogs/CHANGELOG_V21.md#21.6.1">21.6.1</a></b><br/>
+<a href="doc/changelogs/CHANGELOG_V21.md#21.6.0">21.6.0</a><br/>
 <a href="doc/changelogs/CHANGELOG_V21.md#21.5.0">21.5.0</a><br/>
 <a href="doc/changelogs/CHANGELOG_V21.md#21.4.0">21.4.0</a><br/>
 <a href="doc/changelogs/CHANGELOG_V21.md#21.3.0">21.3.0</a><br/>
diff --git a/doc/changelogs/CHANGELOG_V21.md b/doc/changelogs/CHANGELOG_V21.md
index 77461d7a88f8c6..18b0c539d3115b 100644
--- a/doc/changelogs/CHANGELOG_V21.md
+++ b/doc/changelogs/CHANGELOG_V21.md
@@ -8,6 +8,7 @@
 </tr>
 <tr>
 <td>
+<a href="#21.6.1">21.6.1</a><br/>
 <a href="#21.6.0">21.6.0</a><br/>
 <a href="#21.5.0">21.5.0</a><br/>
 <a href="#21.4.0">21.4.0</a><br/>
@@ -42,6 +43,19 @@
   * [io.js](CHANGELOG_IOJS.md)
   * [Archive](CHANGELOG_ARCHIVE.md)
 
+<a id="21.6.1"></a>
+
+## 2024-01-22, Version 21.6.1 (Current), @RafaelGSS
+
+### Notable Changes
+
+This release fixes a bug in `undici` using WebStreams
+
+### Commits
+
+* \[[`662ac95729`](https://github.com/nodejs/node/commit/662ac95729)] - _**Revert**_ "**stream**: fix cloned webstreams not being unref'd" (Matteo Collina) [#51491](https://github.com/nodejs/node/pull/51491)
+* \[[`1b8bba8aee`](https://github.com/nodejs/node/commit/1b8bba8aee)] - **test**: add regression test for 51586 (Matteo Collina) [#51491](https://github.com/nodejs/node/pull/51491)
+
 <a id="21.6.0"></a>
 
 ## 2024-01-15, Version 21.6.0 (Current), @RafaelGSS
diff --git a/src/node_version.h b/src/node_version.h
index 9bd5780a565438..e9c4f77782ab75 100644
--- a/src/node_version.h
+++ b/src/node_version.h
@@ -29,7 +29,7 @@
 #define NODE_VERSION_IS_LTS 0
 #define NODE_VERSION_LTS_CODENAME ""
 
-#define NODE_VERSION_IS_RELEASE 0
+#define NODE_VERSION_IS_RELEASE 1
 
 #ifndef NODE_STRINGIFY
 #define NODE_STRINGIFY(n) NODE_STRINGIFY_HELPER(n)