diff --git a/clever/package.xml b/clever/package.xml
index 2efabacb..0dd13f66 100644
--- a/clever/package.xml
+++ b/clever/package.xml
@@ -36,6 +36,7 @@
   <depend>rosbridge_server</depend>
   <depend>web_video_server</depend>
   <depend>tf2_web_republisher</depend>
+  <depend>python-lxml</depend>
   <exec_depend>python-pymavlink</exec_depend>
   <!-- Use test_depend for packages you need only for testing: -->
   <!--   <test_depend>gtest</test_depend> -->