diff --git a/.gitmodules b/.gitmodules
index 196c9a92..7b72ad6c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -26,3 +26,6 @@
 [submodule "archivebox/vendor/python-atomicwrites"]
 	path = archivebox/vendor/python-atomicwrites
 	url = https://github.com/untitaker/python-atomicwrites
+[submodule "archivebox/vendor/pydantic-pkgr"]
+	path = archivebox/vendor/pydantic-pkgr
+	url = https://github.com/ArchiveBox/pydantic-pkgr