diff --git a/.gitmodules b/.gitmodules
old mode 100644
new mode 100755
index f7804a7..57ca840
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "ext/lua"]
 	path = ext/lua
 	url = git@github.com:lua/lua.git
+[submodule "ext/libzip"]
+	path = ext/libzip
+	url = git@github.com:nih-at/libzip.git
diff --git a/ext/libzip b/ext/libzip
new file mode 160000
index 0000000..5532f9b
--- /dev/null
+++ b/ext/libzip
@@ -0,0 +1 @@
+Subproject commit 5532f9baa0c44cc5435ad135686a4ea009075b9a