bump version number
diff --git a/debian/changelog b/debian/changelog
index 147c4b4..df7e693 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+thrift (0.21.0) stable; urgency=low
+
+  * update to 0.21.0
+
+ -- Apache Thrift Developers <dev@thrift.apache.org>  Mon, 02 Sep 2024 23:30:00 +0100
+
 thrift (0.20.0) stable; urgency=low
 
   * update to 0.20.0
diff --git a/doap.rdf b/doap.rdf
index 703082a..f36508e 100644
--- a/doap.rdf
+++ b/doap.rdf
@@ -57,6 +57,11 @@
     <release rdf:parseType="Collection">
       <Version>
         <name>Apache Thrift</name>
+        <created>2024-09-02</created>
+        <revision>0.21.0</revision>
+      </Version>
+      <Version>
+        <name>Apache Thrift</name>
         <created>2024-02-04</created>
         <revision>0.20.0</revision>
       </Version>