diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 47fe76b..ae4f974 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,7 @@
-=== UNRELEASED
+=== 2.21.1 (2024-12-02)
 
 * Fixed ResourceWarning where file was not properly closed
+* Fixed regexp for date format
 
 === 2.21.0 (2024-11-27)
 
diff --git a/fastjsonschema/version.py b/fastjsonschema/version.py
index e6cdd92..70f17b2 100644
--- a/fastjsonschema/version.py
+++ b/fastjsonschema/version.py
@@ -1 +1 @@
-VERSION = '2.21.0'
+VERSION = '2.21.1'