diff --git a/.gitmodules b/.gitmodules
index 0223549..868039c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "include/MapTo"]
 	path = include/MapTo
 	url = git@git.codeliturgy.com:CodeLiturgy/MapTo.git
+[submodule "include/Math-Expression-Evaluator"]
+	path = include/Math-Expression-Evaluator
+	url = git@git.codeliturgy.com:CodeLiturgy/Math-Expression-Evaluator.git