diff --git a/CHANGELOG b/CHANGELOG
index 8f9b0a570..0ffe85689 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+mkdocs-material-8.2.1+insiders-4.9.1 (2022-02-21)
+
+  * Fixed #3610: missing lxml dependency for privacy plugin
+  * Fixed error when charset is missing in content-type header
+
 mkdocs-material-8.2.1+insiders-4.9.0 (2022-02-20)
 
   * Added privacy plugin: automatic downloading of external assets
diff --git a/docs/insiders/changelog.md b/docs/insiders/changelog.md
index 5bb574c8b..25681cc88 100644
--- a/docs/insiders/changelog.md
+++ b/docs/insiders/changelog.md
@@ -6,6 +6,11 @@ template: overrides/main.html
 
 ## Material for MkDocs Insiders
 
+### 4.9.1 <small>_ February 21, 2022</small> { id="4.9.1" }
+
+- Fixed #3610: missing `lxml` dependency for privacy plugin
+- Fixed error when charset is missing in `content-type` header
+
 ### 4.9.0 <small>_ February 20, 2022</small> { id="4.9.0" }
 
 - Added privacy plugin: automatic downloading of external assets