diff --git a/ci/update-submodules.manifest b/ci/update-submodules.manifest
index 4bd383018..124f6db7c 100644
--- a/ci/update-submodules.manifest
+++ b/ci/update-submodules.manifest
@@ -1,7 +1,9 @@
 library/xml master
 scripts master
 plugins/stonesense master
+plugins/isoworld master
 depends/libzip dfhack
 depends/libexpat dfhack
 depends/xlsxio dfhack
 depends/luacov dfhack
+depends/jsoncpp dfhack