diff --git a/package.xml b/package.xml
index 07e5ace..a8d3b09 100644
--- a/package.xml
+++ b/package.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<package format="2">
+<package format="3">
   <name>serial</name>
   <version>1.2.1</version>
   <description>