diff --git a/.gitmodules b/.gitmodules
new file mode 100644
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--- /dev/null
+++ b/.gitmodules
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+[submodule "structural-probes"]
+	path = structural-probes
+	url = https://github.com/oserikov/structural-probes
diff --git a/structural-probes b/structural-probes
new file mode 160000
index 0000000..2b4f6c0
--- /dev/null
+++ b/structural-probes
@@ -0,0 +1 @@
+Subproject commit 2b4f6c0117ce8d650db44730952c0ffd08fcf5eb