diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..1be7c2df
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "submodules/SourcetrailPythonIndexer"]
+	path = submodules/SourcetrailPythonIndexer
+	url = https://github.com/CoatiSoftware/SourcetrailPythonIndexer.git
diff --git a/submodules/SourcetrailPythonIndexer b/submodules/SourcetrailPythonIndexer
new file mode 160000
index 00000000..7227d9f5
--- /dev/null
+++ b/submodules/SourcetrailPythonIndexer
@@ -0,0 +1 @@
+Subproject commit 7227d9f5c1a4e590b42013fb9367bb79d013fd77