diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78e9ac9..95d2a54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,11 @@ Versioned according to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
-Fixed:
+## [0.1.21] - 2022-05-27
+
+Changed:
 
+ * extract-regions: add parameter `classes` and output COCO, too
  * repair/project: join polygons directly instead of alphashape
 
 ## [0.1.20] - 2022-04-27
@@ -193,6 +196,7 @@ Changed:
   * further improve README
 
 <!-- link-labels -->
+[0.1.21]: ../../compare/v0.1.20...v0.1.21
 [0.1.20]: ../../compare/v0.1.19...v0.1.20
 [0.1.19]: ../../compare/v0.1.18...v0.1.19
 [0.1.18]: ../../compare/v0.1.17...v0.1.18
diff --git a/README.md b/README.md
index 152546c..87bf8ef 100644
--- a/README.md
+++ b/README.md
@@ -16,8 +16,8 @@ In your [Python virtual environment](https://packaging.python.org/guides/install
 Contains processors for various tasks:
 
   - exporting segment images (including results from preprocessing like cropping/masking, deskewing, dewarping or binarization) along with polygon coordinates and metadata:
-    - [ocrd-segment-extract-pages](ocrd_segment/extract_pages.py) (for pages, also exports [MS-COCO](https://cocodataset.org/) format)
-    - [ocrd-segment-extract-regions](ocrd_segment/extract_regions.py) (for regions)
+    - [ocrd-segment-extract-pages](ocrd_segment/extract_pages.py) (for pages, also exports [MS-COCO](https://cocodataset.org/) format and pageview plots)
+    - [ocrd-segment-extract-regions](ocrd_segment/extract_regions.py) (for regions, also exports [MS-COCO](https://cocodataset.org/) format))
     - [ocrd-segment-extract-lines](ocrd_segment/extract_lines.py) (for lines, also exports text and .xlsx)
     - [ocrd-segment-extract-words](ocrd_segment/extract_words.py) (for words, also exports text)
     - [ocrd-segment-extract-glyphs](ocrd_segment/extract_glyphs.py) (for glyphs, also exports text)
diff --git a/ocrd_segment/ocrd-tool.json b/ocrd_segment/ocrd-tool.json
index 3445e23..9ec3778 100644
--- a/ocrd_segment/ocrd-tool.json
+++ b/ocrd_segment/ocrd-tool.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.1.20",
+  "version": "0.1.21",
   "git_url": "https://github.com/OCR-D/ocrd_segment",
   "tools": {
     "ocrd-segment-repair": {