diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6b40fa..b359acf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.0.0-beta.21](https://github.com/recap-utr/arguebuf-python/compare/v2.0.0-beta.20...v2.0.0-beta.21) (2023-02-08)
+
+
+### Features
+
+* make nodes and edges hashable ([bc33e86](https://github.com/recap-utr/arguebuf-python/commit/bc33e8685998c5dee73c58d95ffe678027916ac2))
+
 ## [2.0.0-beta.20](https://github.com/recap-utr/arguebuf-python/compare/v2.0.0-beta.19...v2.0.0-beta.20) (2023-02-08)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index bd129c3..7ac8aa1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "arguebuf"
-version = "2.0.0b20"
+version = "2.0.0b21"
 description = "A library for loading argument graphs in various formats (e.g., AIF)."
 authors = ["Mirko Lenz <info@mirko-lenz.de>"]
 license = "MIT"