diff --git a/.gitmodules b/.gitmodules
index 2989f8a..626d10f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "lib/json"]
 	path = lib/json
 	url = https://github.com/nlohmann/json.git
+[submodule "lib/openXLSX"]
+	path = lib/openXLSX
+	url = https://github.com/troldal/OpenXLSX.git
diff --git a/lib/openXLSX b/lib/openXLSX
new file mode 160000
index 0000000..b80da42
--- /dev/null
+++ b/lib/openXLSX
@@ -0,0 +1 @@
+Subproject commit b80da42d1454f361c29117095ebe1989437db390