diff --git a/.gitmodules b/.gitmodules
index 218f36e385..efb9a2fffb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -14,3 +14,6 @@
 [submodule "visualization"]
 	path = modules/visualization
 	url = https://develop.openfoam.com/modules/visualization.git
+[submodule "external-solver"]
+	path = modules/external-solver
+	url = https://develop.openfoam.com/Modules/external-solver.git
diff --git a/modules/external-solver b/modules/external-solver
new file mode 160000
index 0000000000..06a957b95a
--- /dev/null
+++ b/modules/external-solver
@@ -0,0 +1 @@
+Subproject commit 06a957b95a9da798e17ad7d65a9a2d19579c2574