diff --git a/lib/st/package.xml b/lib/st/package.xml
index 7af883e..d606aad 100644
--- a/lib/st/package.xml
+++ b/lib/st/package.xml
@@ -17,7 +17,7 @@
  specific language governing permissions and limitations
  under the License.
  -->
-<!-- Apache Thrift Smalltalk library version 0.20.0 -->
+<!-- Apache Thrift Smalltalk library version 0.21.0 -->
 <package>
   <name>libthrift-st</name>
   <file>thrift.st</file>