diff --git a/package.xml b/package.xml
index 691be44..a8819cb 100644
--- a/package.xml
+++ b/package.xml
@@ -15,7 +15,7 @@
   limitations under the License.
 -->
 
-<package format="2">
+<package format="3">
   <name>cartographer</name>
   <version>1.0.0</version>
   <description>
@@ -38,7 +38,7 @@
 
   <build_depend>git</build_depend>
   <build_depend>google-mock</build_depend>
-  <build_depend>python-sphinx</build_depend>
+  <build_depend>python3-sphinx</build_depend>
 
   <depend>boost</depend>
   <depend>ceres-solver</depend>