diff --git a/CHANGELOG b/CHANGELOG
index d41a905aa..a1df12da4 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+mkdocs-material-8.3.9+insiders-4.20.1 (2022-07-11)
+
+  * Fixed #4105: Tags plugin fails if tags_file is not set (4.20.0 regression)
+
 mkdocs-material-8.3.9+insiders-4.20.0 (2022-07-07)
 
   * Added support for additional tags indexes
diff --git a/docs/insiders/changelog.md b/docs/insiders/changelog.md
index 862b1dd98..d71e6875c 100644
--- a/docs/insiders/changelog.md
+++ b/docs/insiders/changelog.md
@@ -6,6 +6,10 @@ template: overrides/main.html
 
 ## Material for MkDocs Insiders
 
+### 4.20.1 <small>_ July 11, 2022</small> { id="4.20.1" }
+
+- Fixed #4105: Tags plugin fails if `tags_file` is not set (4.20.0 regression)
+
 ### 4.20.0 <small>_ July 7, 2022</small> { id="4.20.0" }
 
 - Added support for additional tags indexes