diff --git a/ball_detector/package.xml b/ball_detector/package.xml
index e0d63a5..c612c4f 100644
--- a/ball_detector/package.xml
+++ b/ball_detector/package.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<package>
+<package format="2">
   <name>ball_detector</name>
   <version>0.1.0</version>
   <description>
diff --git a/op3_demo/package.xml b/op3_demo/package.xml
index ccc8d31..cff56e8 100644
--- a/op3_demo/package.xml
+++ b/op3_demo/package.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<package>
+<package format="2">
   <name>op3_demo</name>
   <version>0.1.0</version>
   <description>