diff --git a/.gitmodules b/.gitmodules
index 2fad9ac91de0af2125b3c26ee2a7ac348eb8d91b..98bfd930737f28407f1bee782ff9c1a4f09f3479 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -31,3 +31,6 @@
 [submodule "ThirdParty/jedbrown-cmake-modules"]
 	path = ThirdParty/jedbrown-cmake-modules
 	url = https://github.com/jedbrown/cmake-modules.git
+[submodule "ThirdParty/exprtk"]
+	path = ThirdParty/exprtk
+	url = https://github.com/ArashPartow/exprtk.git
diff --git a/ThirdParty/exprtk b/ThirdParty/exprtk
new file mode 160000
index 0000000000000000000000000000000000000000..e0e880c3797ea363d24782ba63fe362f7d94f89c
--- /dev/null
+++ b/ThirdParty/exprtk
@@ -0,0 +1 @@
+Subproject commit e0e880c3797ea363d24782ba63fe362f7d94f89c